Find f such that f' (x) = 6x - 7, f(6) = 0. f(x) =]A company determined that the marginal cost, C'(x) of producing the xth unit of a product is given by C'(x) = x" - 4x. Find the total cost function C, assuming that C(x) is in dollars and that fixed costs are $5000. C(x) =Find the area between the curve and the x-axis over the indicated interval. 2 . y=4-x : [-2, 2] The area under the curve is (Simplify your answer.)