P(x)= 57- 8In

8. The demand for a new computer game can be modeled by p(x) = 57 - 8 In xfor 0 S x $ 800, where p(x) is the price consumers will pay, in dollars, and x is the number of games sold, in thousands. a) Find the revenue function, R(x). b) Find the marginal revenue, R'(x). c) How many units will be sold if the price that consumers are willing to pay is $40? Round to the nearest whole number