help me please

1-*To determine the installments required to repay the loan. We may use the present value of the annuity - immediate true and fault 2-**Annuity - due is also called an ordinary annuity true and fault 1-A man wants to save $ 267,721 to pay for his son's education within 4 years. The Education Fund requires investors to deposit equal installments annually at the end of each year. If interest was paid at 8.889% how much would a man have to save each year to achieve his goal? 2-A man borrows a loan of $ 18,746 to purchase a car at annual rate of interest of 796. He will pay back the loan through monthly installments over 5 years, with the first installment to be made one month after the release of the loan. What is the monthly installment he needs to pay? 3-Roger's uncle leaves an estate of $ 200,000. Interest on the estate is paid to Roger for the first 10 years, to Roger's sister Sally for the second 10 years and to the Daisy Lovers Association thereafter. All the payments are made at the end of the year, assuming that the estate earns 7% annual effective rate of interest. Find the amount of every yearly payment 4-Roger's uncle leaves an estate of $ 200.000. Interest on the estate is paid to Roger for the first 10 years, to Roger's sister Sally for the second 10 years and to the Daisy Lovers Association thereafter. All the payments are made at the end of the year, assuming that the estate earns 7% annual effective rate of interest. Find the relative shares that DLA have in the estate