20 d.. .. . . U=SX'7X9'3 .. .. . . au lo 5 utlllty function Is 1 _ Furthermore, It IS known that hls Income and prices are: m = 200, P1 = 5, P2 = 10, respectively. a) What are the quantities demanded of X1 and X2 that maximize his utility? \"Graphically \"your answer b) If Claudio is offered two promotions: - Buy a coupon book for $50 that entitles you to consume 12 units of X1, or, - Buy a pack of 5 units of X1 with a 20% discount on the price. What would be his decision? c} If they offer the same promotion to Teresa, Claudio's sister, who has the same income and faces the same prices and is always willing to exchange 2 units of X1 for 1 unit of X2. What would be his decision