5. Mr. G has $15,000 to invest. He is undecided about putting the money into tax-exempt municipal bonds paying 7 percent annual interest or corporate bonds paying 9.5 percent annual interest. The two investments have the same risk. a) Which investment should Mr. G make if his marginal tax rate is 33 percent? b) Would your conclusion change if Mr. G’s marginal tax rate is only 15%?