Let R(x), C(x), and P(x) be, respectively, the revenue, cost, and profit, in dollars, from the production and sale of x items. If R(x)equals=66x and C(x)equals=0.002 x squared plus 2.8 x plus 600.002x2+2.8x+60, find each of the following. a) P(x) b) R(5050), C(5050), and P(5050) c) Upper R primeR′(x), Upper C primeC′(x), and Upper P primeP′(x) d) Upper R primeR′(5050), Upper C primeC′(5050), and Upper P primeP′(5050)