Use Prn1−1+rn−nt to determine the regular payment amount, rounded to the nearest dollar. Consider the following pair of mortgage loan options for a $150,000 mortgage. Which mortgage loan has the larger total cost (closing costs + the amount paid for points + total cost of interest)? By how much?Mortgage A: 15-year fixed at 9.25% with closing costs of $1500 and 1 point.Mortgage B: 15-year fixed at 7.5% with closing costs of $1500 and 5 points.