Suppose an H1200 supercomputer has a cost of $150,000 and will have a residual market value of $30,000 in 4 years. The risk-free interest rate is 5.1% APR with monthly compounding. a. What is the risk-free monthly lease rate for a 4-year lease in a perfect market? b. What would be the monthly payment for a 4-year $150,000 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 4-year lease in a perfect market? The present value of the lease payments is $ . (Round to the nearest dollar.)