Final answer:
Hunter's annual or monthly repayment amounts for a $60,000 loan at 8.5% interest rate and Jingyun's accumulated bank account value can be calculated using annuity formulas: annuity due and ordinary annuity for Hunter's scenario, and future value of an annuity for Jingyun's deposits.
Step-by-step explanation:
Loan Repayment Calculations
To calculate Hunter's repayments for a $60,000 loan at an effective annual interest rate of 8.5% to be repaid over 10 years, we can use various formulas for annuities.
Part a) Annual Payments at the Beginning of Each Year
Hunter is making payments at the beginning of each period, which is an annuity due scenario. To find the annual payment, we use the present value formula for an annuity due: PV = R[1 + i × (1 − (1 + i)^−n) / i]. Solving for R gives us the regular payment Hunter must make.
Part b) Annual Payments at the End of Each Year
For payments at the end of each year, we use the ordinary annuity formula: PV = R[(1 − (1 + i)^−n) / i]. Again, we solve for R to find Hunter's payment.
Part 2) Monthly Payments
For equal monthly payments, we first convert the annual interest rate to a monthly rate by dividing by 12. Since the payments are at the end of each period, we use the ordinary annuity formula with the monthly interest rate and number of periods (120).
Part 3) Accumulated Value of Jingyun's Bank Account
Jingyun makes monthly deposits into an account with a semi-annual interest rate of 7.2%. To calculate the accumulated value, we use the future value formula of an annuity for monthly deposits: FV = d[[(1 + i)^n - 1] / i], where i is the monthly interest rate and n is the total number of deposits made.