Problem 6 Find the partial derivative with respect to x for the following functions: (a) p = 56 (b) y(x)=56-4x (c) m = r (d) q= x (e) f(x) =x3 (f) g(x,y) = xy 2 (g) h(x,y) = Ax1/2y1/2, where A is a constant. (h) z(x) = (x-7)(2+x) (i) q = (x+1) (j) m = (2x+1)2