(1) Find the function f (x) for which f" (x) - 12x2 + 6, f(1) = 1, and f' (1) = 12. (Provide some brief commentary on the steps you take.) (2) Find the function f(x) with f' (x) - 9/ vx for which the line y = 3x + 13 is tangent to the graph of f (x) at some point. (Explain the ideas behind the steps you take.)