Suppose f and g are differentiable functions and let h(x) = f(x)9(x), then h'(x) is given by the following form h'(x) = g(x) (f(x)) 9-1. f'(x) + (In(f(x))) (f(x)) g'(x) . Use this formula to find the derivative for each of the following functions. (a) h(x) = x5 h'(x) = (b) h(x)=5x h'(x) = (c) h(x)=(cos(x))* h'(x) =