Please help,

Suppose an H1200 supercomputer has a cost of $ 450,000and will have a residual market value of $ 67,500 in 7 years. The risk-free interest rate is 5.6 % APR with monthly compounding. a. What is the risk-free monthly lease rate for a 7-year lease in a perfect market? b. What would be the monthly payment for a 7-year $ 450 comma 000 risk-free loan to purchase the H1200? Note: Round the monthly interest rate to at least six decimal places. a. What is the risk-free monthly lease rate for a 7-year lease in a perfect market?The present value of the lease payments is $. (Round to the nearest dollar.)The risk-free monthly lease rate for a 7-year lease in a perfect market is $. (Round to the nearest dollar.) b. What would be the monthly payment for a 7-year $ 450 comma 000 risk-free loan to purchase the H1200?The monthly payment for the risk-free loan is $nothing. (Round to the nearest dollar)