Using the Keynesian model, the effect of a government-imposed ceiling on interest rates paid on personal checking accounts that is lower than the current market interest rate would be to cause in the real interest rate and in output in the short run.

Suppose your rich uncle gave you $50,000, which you plan to use for graduate school. you will make the investment now, you expect to earn an annual return of 6%, and you will make 4 equal annual withdrawals, beginning 1 year from today. under these conditions, how large would each withdrawal be so there would be no funds remaining in the account after the 4th withdraw?