Just need help with part C D and E, thank you.

1. A manufacturer estimates that when x units of an item are produced the total cost will be C(x) = $13 + 2x + 50 dollars, and that all x units will be sold when the price is p(x) = %(50x) dollars per unit. a. Find the marginal cost b. Find the marginal revenue b. 0. Use the marginal revenue to estimate the revenue derived from the sale of the tenth unit. 0. d. What is the actual revenue derived from the sale of the tenth unit? e. What is the prot function