Q: Suppose is a differentiable function of and , and . Use the table of values to calculate and .

(0, 0) 3 6 4 8 (1, 2) 6 3 2 5

I apply the chain rule for 2 independent/2 dependent variable how I /think/ it's suppose to be applied in this problem:

,

,

But the answer in BOB is 7, 2... Where is my error in understanding?