How to solve this exal boxes please complete please tonly one of the figram needs to be ussedbtos are just exalples i am more needing help with filling out the boxes

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An engineer borrowed $$3000$ from the bank, payable in six equal end$-$of$-$year payments at $8\%.$ The bank agreed to reduce the interest on the loan if interest rates declined before the loan was fully repaid. After the third payment, the bank agreed to reduce the interest rate on the remaining debt to$.$ What was the amount of the equal annual end$-$of$-$year payments for each of the first $3$ years? What was the amount of the equal annual end$-$of$-$year payments for each of the last $3$ years?

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