U(x; y) = xy + y
a) Calculate the uncompensated (Marshallian) demand functions for
x andy and describe how the demand curves for x and y are
shifted by changes in I or the price of the other good.
b) Calculate the expenditure function for goods x and y.
c) Use the expenditure function calculated in part b) to compute
the compensated demand functions for goods x and y . Describe
how the compensated demand curves for x and y are shifted by
changes in income or by changes in the price of the other good.