[25] Besties, Sohail and Jimmy are binge-watching Twilight when the Covid lockdown starts. Owing to mobility restrictions, for a two-week period, they are shut off from the rest of society (think of this as a deserted island situation). Although they are unable to produce anything, they are very fortunate and each of them has a supply of cookies (c) and Mountain Dew (d). Sohail has 4 cookies and 3 bottles of Mountain Dew, while Jimmy has 3 cookies and 4 bottles of Mountain Dew. Although they like the same products, they have different preferences over them; Sohail's utility function is U(c, d) = Cd2 and Jimmy's utility function is U(C, d) = 3c2d. a. [4] Characterize the set of Pareto Optimal allocations of cookies and Mountain Dew across Sohail and Jimmy. Now, suppose that the lockdown pals decide to engage in trade. b. [6] Without normalizing prices, find their demand functions for each good. c. [2] Write the excess demand function for cookies. d. [6] Normalizing the price of Mountain Dew, find the equilibrium price of cookies (p3) that clears the two markets. How many cookies and how much Mountain Dew does each of them consume in the competitive equilibrium