Differentiability Consider the following piecewise defined function f(x) { f(x) = { 2x^2 - 4x - 1, { - x^2 + 14x - 28, x>3 x QUESTION 2 Apply the product rule to find the derivative of each of the following functions f(x) = (2x2 + 4x + 3) e* a) { f(x) = (2x^2 + 4x + 3) e^x } %3! b) g(x) = cos? x = (cos x) (cos x) { g(x) = cos^2 x = (cos x) (cos x) }