A company manufactures microchips. Use the revenue function R(x)=x(72- 3x) and the cost function Cix) = 125+ 13x to answer parts (A)- (E), where xis in million of chips and R(x) and C(x) are in millions of dollars Both functions have domain 1sxs 20 (A) Form a profit function P. and graph R. C. and P in the same rectangular coordinate system P(x) -D