Let f(x) = 2x - 16x + 5. a. Find the values of x for which the slope of the curve y = f(x) is 0. b. Find the values of x for which the slope of the curve y = f(x) is - 12 a. The slope of the curve is 0 at x = (Simplify your answer. Use a comma to separate answers as needed.) b. The slope of the curve is - 12 at x = (Simplify your answer. Use a comma to separate answers as needed.)