Question 7. Determine manually the monthly repayments needed to repay a $100000 loan if: a) the loan is paid back over 25 years when the interest rate is 9% compounded annually, b) the period of repayment is reduced to 20 years and the interest rate rises to 10% c) In each case above, write Excel functions those can be used to compute monthly repayment. Provide the screen print of the Excel file and the solution