2. Suppose that f is a twice differentiable function (everywhere). The so-called arclength kernel of f is the function h defined by h(x) = V1+f'(x)2 and is used to help compute the length of a curve y = f(x). (We won't be doing that here.) (a) Suppose that f(2) = 4 and f'(2) = 3 and f"(2) = 6. Compute h'(2). (b) Compute the formula for h'(x) when f(x) = sin(x)