Could you help to solve this question?

4. (25 points) Consider an exchange economy with two goods (x and y) and two agents (a and b). Agent a has preferences represented by Wa (Ta, ya) = Caya and endowment (wa, wa) = (2, 3). Agent b has preferences represented by ub(Xb, yb) = min {xb, 2yb} and endowment (wo = (6, 1). (a) Compute and draw the contract curve, the core, and all Walrasian equilibria. (b) Repeat part (a), but where agent a has preferences represented by max { Ta, 2ya}