Explanation of Responses:
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(1)
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Transaction made pursuant to duly adopted trading plan under Rule 10b5-1(c).
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(2)
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This transaction was executed in multiple trades at prices ranging from $311.03 to $311.98. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(3)
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This transaction was executed in multiple trades at prices ranging from $312.03 to $313.01. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(4)
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This transaction was executed in multiple trades at prices ranging from $313.05 to $313.98. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(5)
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This transaction was executed in multiple trades at prices ranging from $314.05 to $315.03. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(6)
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This transaction was executed in multiple trades at prices ranging from $315.08 to $316.07. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(7)
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This transaction was executed in multiple trades at prices ranging from $316.12 to $317.06. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(8)
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This transaction was executed in multiple trades at prices ranging from $317.13 to $318.12. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(9)
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This transaction was executed in multiple trades at prices ranging from $318.13 to $319.12. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(10)
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This transaction was executed in multiple trades at prices ranging from $319.18 to $320.08. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(11)
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This transaction was executed in multiple trades at prices ranging from $320.19 to $321.18. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(12)
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This transaction was executed in multiple trades at prices ranging from $321.22 to $321.95. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(13)
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This transaction was executed in multiple trades at prices ranging from $322.30 to $323.15. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(14)
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This transaction was executed in multiple trades at prices ranging from $323.44 to $324.18. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(15)
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This transaction was executed in multiple trades at prices ranging from $324.66 to $325.59. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(16)
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This transaction was executed in multiple trades at prices ranging from $325.69 to $326.66. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(17)
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This transaction was executed in multiple trades at prices ranging from $326.69 to $327.66. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(18)
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This transaction was executed in multiple trades at prices ranging from $327.70 to $328.64. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(19)
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This transaction was executed in multiple trades at prices ranging from $328.71 to $329.63. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(20)
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This transaction was executed in multiple trades at prices ranging from $329.72 to $330.70. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(21)
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This transaction was executed in multiple trades at prices ranging from $330.73 to $331.52. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(22)
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As Trustee of the Hastings-Quillin Family Trust
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