Let y = f(a) be a twice-differentiable function such that f (-1) = 5 and dy dx = = (xy2 + 4y)2. What is the value of day da2 at x = -1? A -190 B -70 C -2 D 10\fThe gure above shows the graph of f" , the derivative of the function f. At which of the four indicated values ofa: is f" (a?) least? A D on