You are saving to buy a $189,000 house. There are two competing banks in your area, both offering certificates of deposit yielding 7.4 percent. a. How long will it take your initial $106,000 investment to reach the desired level at First Bank, which pays simple interest? (Do not round intermediate calculations and round your answer to 2 decimal places, e.9. 32.16.) b. How long will it take your initial $106,000 investment to reach the desired level at Second Bank, which compounds interest monthly? (Do not round intermediate calculations and round your answer to 2 decimal places, e.9., 32.16.)