13. Calculate the monthly payment for a home loan of $100,000 financed at 7% over 30 years. 14. Calculate the monthly payment for a home loan of $150,000 financed at 6%% over 15 years. 15. Calculate the NPV of a machine which is bought for $5,000.00, sold at the end of year 5 for $2,500.00, and produces the following cash flows: year 1) +$700; year 2) +$600; year 3) +$500; year 4) +$400; year 5) +300, assume the cost of capital is 10%