I need help with these two problems please, and please answer all parts of the questions and make it it legible. You can see from the pics how many parts of the problems their are.

Part 1 of 2 Use Taylor's formula for f(x,y) at the origin to find quadratic and cubic approximations of f near the origin. f(x,y) = 4 cos (x2 + 2) . . . . . The quadratic approximation isUse Taylor's formula to nd a quadratic approximation of f(x,y) = 5 cos x cos y at the origin. Estimate the error in the approximation if |x| 5 0.12 and M s 0.11. Find a quadratic approximation of f(x,y) = 5 cos x cos y at the origin. m = D