13. Please show all work and type out the answers! I'm really bad at reading hand writing, thank you so much!

55q The cost function for q units of a certain item is C(q) = 98q + 110. The revenue function for the same item is R(q) = 98q+ In q a. Find the marginal cost. b. Find the profit function. c. Find the profit from one more unit sold when 8 units are sold. a. The marginal cost is b. P(q) = c. The profit from one more unit when 8 units are sold is approximately $ (Type an integer or decimal rounded to two decimal places as needed.)