We found that the marketing research department for the company that manufactures and sells memory chips for microcomputers established the following price-demand and revenue functions: P(X) = 95 - 4X Price-demand function R(X) = xp(x) = x(95 4x) Revenue function where p(x) is the wholesale price in dollars at which x million chips can be sold: and R(x) is in millions of dollars. Both functions have domain 15x S19. (A) Which ofthe fo owing is the graph of the revenue function? 600 400 200 04540 -50 D 5 WE 15 20 (B) Find the output that will produce the maximum revenue. million chips (Type an integer or a fraction. Simplify your answer.)