For questions 4 - 7 you must show some working not just the answer. At minimum you should show the correct quantities including signs in the correct places in the correct function. Round money answers to the nearest cent and time answers to the nearest tenth of a month. 4. What is the final value of $2000 invested for one year at 5% APR, simple interest? 5. Find the final value of $750 invested at 8% APR compounded monthly for t years. 6. Find the monthly payments required to save $2000 in 5 years at 9% APR. 7. Find the time in months required to pay off a debt of $140 if monthly payments of $12 are made and the APR is 4%