3. Lending institutions often charge closing costs for mortgages. Closing costs comprise of a fixed fee and loan origination fee or points, which is a fixed percentage of the mortgage. You are financing a home purchase and want to analyze closing costs. You research a local bank and credit union and find the following information: Bank closing costs: Fixed costs are $500 and points are 1.5% of the mortgage amount. Credit Union closing costs: Fixed costs are $1,750 and points are 1% of the mortgage amount. a. (3 pts) Bank: Write a formula, B, for the closing costs as a function of the mortgage amount, m. b. (3 pts) Credit Union: Write a formula, C, for the closing costs as a function of the mortgage amount, m. C. (5 pts) What mortgage amount would result in the same closing costs? Solve by hand. d. (4 pts) If your mortgage amount is $325,000, which financial institution would you choose to minimize closing costs