62. (a) C = 5Vx + 100 R = 40, P = 40 - 5Vx + 100 X XanCSImenl tiller 1.) yr. 32. Business: average revenue, cost, and profit. Given revenue and cost functions R(x) = 40x and C (x) = 5V; + 100, find each of the following. Assume R(x) and COO are in dollars and x is the number of lamps produced. [1.6] a) The average cost, the average revenue, and the aver- age profit when ): lamps are produced and sold b) The rate at which average cost is changing when 9 lamps are produced