Please handwrite the answer.

4. Consider an exchange economy with endowments w\"1 = [12,8] and w3 = [8,8] and quasilinear preferences Lew} = 2 x3' + x; and Hos\") = 4M+ x3. (a) Find all interior points on the contract curve. (b) Argue that there are also points on the contract curve along the edges of the Edgeworth Box, establishing the contract curve as a collection of allocations connecting the upper right and lower left corners. (c) Solve for a competitive equilibrium