Suppose the real money demand is given by =0.9(+)

where is real money demand, is the exponential function, is real interest rate, is growth rate of money, and is output. The money market equilibrium condition is =, where is the quantity of money and is the price level.

How, if at all, does an increase in affect the government's real revenue from printing money? Explain your answer. What value of maximizes the government's real revenue from printing money? Show mathematically and be sure to show the steps leading to your answer.