A Monopoly With Constant Marginal Costs Of $50 Can Sell To Three Groups Of Potential Consumers, With Demands Q1 = 800 - 0.2p, Q2 = 400 - P, And Q3 = 700 - 0.4p Respectively. Find The Optimal Price- Quantity Combination In Each Market (I) If The Firm Is Able To Price-Discriminate; (Ii) If It Is Not Able To Price-Discriminate.