solve question number 6 please

4. a. Someone in the 36 percent tax bracket can earn 9 percent annually on her investments in a tax-exempt IRA account. What will be the value of a one-time $10,000 investment in 5 years? 10 years? 20 years? b. Suppose the preceding 9 percent return is taxable rather than tax-deferred and the taxes are paid annually. What will be the after-tax value of her $10,000 investment after 5,10 , and 20 years? 5. a. Someone in the 15 percent tax bracket can earn 10 percent on his investments in a taxexempt IRA account. What will be the value of a $10,000 investment in 5 years? 10 years? 20 years? b. Suppose the preceding 10 percent return is taxable rather than tax-deferred. What will be the after-tax value of his $10,000 investment after 5,10 , and 20 years