4. (6 marks) Michael has the utility function u(x, y) = x/E + . Michael's preferences are strongly increasing and strongly convex. You don't need to show this. (a) (3 marks) Compute the expenditure minimizing demands for x and y as functions of utility u and prices. (b) (3 marks) Compute the CV when prices and income change om (papal) = (10,10,10) to (5.2020)