can someone please help? our lesson is about solving problems involving interest. Please do comment if need more information

PROBSET 6 1. Find the amount at the end of 12 years if P20 000 is invested at an interest rate of 10% compounded quarterly in the first 3.5 years, 9% converted semiannually in the next 4.5 years, and. 8% simple interest rate in the remaining years. 2. Find the present value of P23 000 due in 5 years and 5 months if money is worth 10 k% compounded quarterly. 3.0m April 9, 2002, Rosalina borrowed P38 000. She agreed to pay the principal and the interest at 10.5% compounded sami-annually on February 9, 2008. How much will she pay them? . r at . . [93% 4. Given C = P(1 +?) , show the derivation for. t= and n109(1+%) r = 4%)? 1]