does anyone understand interest rates?

dancing_s7

New member
can you please show a full explanation to this question? thank you

Charla borrowed $2,500 for 2½ years. For the first 1½ years, the interest rate on the loan was 4% compounded semi-annually. Then the rate became 6% compounded monthly. What total amount was required to pay off the loan if no payments were made before the expiry of the 2½-year term? For full marks your answer(s) should be rounded to the nearest cent.
 
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