Suppose the revenue function (in US dollars) for the sale of a particular product is R(x) = -2x + 10x and the cost function is C(x) = 4x. Find (a) the quantity of product that will maximize profit and (b) the break-even quantity. Enter your answers below, rounded to the nearest 10th (For example express 7 as 7.0 and 5.72 as 5.7). (a) The quantity needed to maximize profit is [A] (b) The break-even quantity is [B]