Consider the following. f(x, y) = x/ y X (a) Find f(30, 15) and f(30.5, 15.25) and calculate Az. f(30, 15) = f(30.5, 15.25) = Az = (b) Use the total differential dz to approximate Az.

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A: Since you have asked multiple questions, we will solve the first question for you. If you want any…