Suppose an H1200 supercomputer has a cost of $ 400 comma 000$400,000 and will have a residual market value of $ 160 comma 000$160,000 in 55 years. The? risk-free interest rate is 6.3 %6.3% APR with monthly compounding.
a. What is the? risk-free monthly lease rate for a 55?-year lease in a perfect? market?
b. What would be the monthly payment for a 55?-year $ 400 comma 000$400,000 ?risk-free loan to purchase the? H1200?
?Note: Round the monthly interest rate to at least six decimal places.
Please use Excel