5. [25] Super-friends, Sohail and Jimmy are binge-playing Super-Smash Siblings" when they realize that they don't want to interact with the rest of the world for the foreseeable future (think of this as a deserted island situation caused by a mild obsession with this videogame). Their paucity of life skills means that they cannot produce anything, and they must subsist on the goods that they can find their living quarters. Sohail manages to collect 3 jars of peanut butter and 12 gummy worms, while Jimmy scrounges tougher 3 gummy worms and 5 jars of peanut butter. Although they like the same products, they have different preferences over them; Sohail's utility function is U(Xgw, Xpb) = XgwXpb and Jimmy's utility function is U(Xgw, Xpb) = 2XgwXpb , where * denotes the number of gummy worms and Xpb denotes the number of jars of peanut butter that they consume