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12. [0/1 Points] DETAILS PREVIOUS ANSWERS WANEFMAC7 15.3.050.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A shipping service will accept only packages with length no more than 108 inches and length plus girth no more than 171 inches. (See the figure.) Length Girth What are the dimensions of the largest-volume package that service will accept? length 108 x in width 42.75 in height 42.75 X in What is its volume? 197376.75 x cubic inches Need Help? Read It Master It7. [0/1 Points] DETAILS PREVIOUS ANSWERS WANEFMAC7 15.2.031.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Find of of of HINT [See Example 3.] ax' ay az 4 f ( x, y, Z ) = - xty+ zz of ax X of X ay of = Undefined az X Find their values at (0, -1, 1) if possible. (If an answer is undefined, enter UNDEFINED.) of -(0, -1, 1) = 1 X ax (0, -1, 1) = 2 X ay of (0, -1, 1) = 2 az X