ACME Woodgets produces two related types of woodgets: type A and type B. The demand equations for these products are QA = 120 -3PA + 2PB and QB = 100 + PA 2PB where QA and QB are the weekly demands for type A and type B woodgets, respectively, and PA and PB are the prices that ACME sets for these goods. (a) (2 pts) Find ACME Woodgets' revenue as a function of the prices: R = R(PA, PB). (b) (4 pts) Find OR/PA and OR/PB. (c) (2 pt) Find the prices that ACME should set so that OR/OPA = 0 and OR/ OPB= 0