[30 Points] The price-demand equation and the cost function for the production of HDTVs are given, respectively, by p(x) = 300 - and C (x) = 150.000 + 30x 30 Where x is the number of HDTVs that can be sold at a price of Sp per TV and C(x) is the total cost (in dollars) of producing x TVs (a) Find the marginal cost and marginal average cost when x = 2000 . Interpret your results . (b) Find the revenue function ?(x) . (c) Find the marginal revenue and marginal average revenue when x = 2000 . Interpret your results