QUESTION 4 Consider function g (x, y) = XV The partial derivative og(x, y) xty ox O A. V (x+y)2 O B. v2 (x+y) OC. (x+ 1 )2 OD. xy (x+ y)2QUESTION 5 Consider function f(x) = a (Ex+ 1)" with a and n being constants. Suppose f"(x) = 1 for every value of x. We then know that O A. g = 2 and n = 2 O B. g = 1 and n = 1 OC g = 1 and n = 2 OP. a = 2 and n = 1QUESTION 6 Let z = h(h(x)) be a composite function, and h(x) = 1/x. Then, derivative dz/dx = O A. 1 OB. X OC1/X OD.O