For each of the following, write down the limit that is used to represent the derivative. Then simplify the expression in order to evaluate the limit. a. Use limit definition of derivative to find f(2), where f(x) = 4x + 1 { f(x) = sqrt(4x + 1) evaluated at x = 2. ) b. Use limit definition of derivative to find g'(a), where a(x) = x3 - 4x { g(x) = x^3 - 4x evaluated at x = a. } %3D