5. (20 points) (a) When using the excess demand map in 2 dimension to prove the existence of a com- petitive equilibrium, we used the fact that lim 22(1, p2) = too P20 lim 22(1,P2) 0 5. (20 points) (a) When using the excess demand map in 2 dimension to prove the existence of a com- petitive equilibrium, we used the fact that lim 22(1, p2) = too P20 lim 22(1,P2) 0