4. Let p = 30 - 0.02x, C(x) - 2.5x + 8000, 0

4. Let p 30 + 8000, o < x 2500 be the price-demand equation and cost fimction, respectively [8 marks (a) Find the marginal cost, average cost, and marginal average cost functions. (b) Express the revenue in terms of and fincl the marginal revenue, average revenue. and marginal averaoe revenue functions. (c) Find the profit, marginal profit, average profit, and marginal aver- age profit functions. (d) Evaluate the mnrginal profil and 1()()() and interpret the results