5. A bank lends a customer money at an APR of 9 %. The loan is to be repaid by a single lump sum of 25,000 after 10 years. (a) What is the amount of the loan? (b) After 1 year, the customer asks to change the repayment to two equal payments payable after 5 and 7 years from the start of the loan. Write the equation of value and determine the amount of each repayment. (c) How much would the repayments be after 5 and 7 years if the customer borrowed further amounts of 10,000 18 months after the start of the loan and then 5000 three years after the start of loan? Remember to start by writing the equation of value