4. Consider a two-consumer economy in which wA = (1, 1), w = (2,3), uf(at, x2 ) = afta2 and uB(x] , x5 ) -2 ) = 21 2 (a) Illustrate this economy in an Edgeworth box. (b) Define a competitive equilibrium for this economy. (c) Derive a competitive equilibrium for this economy