Loan Amortization: Principal repayment

Suppose you borrowed $$25,000$ at a rate of $8\%$ and must repay it in $4$ equal installments at the end of each of the next $4$ years. By how much would you reduce the amount you owe in the first year?

Loan Amortization: Ending balance

Suppose you borrowed $$25,000$ at a rate of $8\%$ and must repay it in $4$ equal installments at the end of each of the next $4$ years. How much would you still owe at the end of the first year, after you have made the first payment?

Please use BAII Plus and show the steps to calc