Please help please help

A A debt of RM1000 due in one month and another RM1200 due in eight months are to be settled by a single payment at the end of five months. Find the size of this payment using the end of four months as the focal date, assuming money is worth 9% per annum simple interest. B RM25,000 is invested for 9 years 9 months. The investment is offered 6% compounded monthly for the first 5 years 6 months years and 8% compounded quarterly for the rest of the period. Calculate the future value of this investment. C Mr. Ah Chong invested RM50,000 at 8% compounded semi-annually. This investment is to support his children's education. Now, his children are 13, 10 and 8 years old. Equal amount will be withdrawn when they reach 18 years old. Find the amount for each withdrawal. D Find the accumulated value of RM1,500 for 3 years 9 months at 8% compounded continuously