Question 2.7 Find the accumulated value at time 15 years of regular payments of $50 made at times 5 years, 6 years, and so on, with the last payment at time 10 years. Use an annual effective interest rate of 16% and an annuity-due. Question 2.9 $100 per year is received continuously from time 5 years to time 8 years. Assuming an annual effective interest rate of 4.5%, what is the accumulated value at time 10 years? Question 2.11 Payments of $5,000 are received at the end of each year for 10 years, after which payments of $1,000 are received at the end of each year forever. The annual effective interest rate is 9%. Determine the present value of these payments. Question 2.7 Find the accumulated value at time 15 years of regular payments of $50 made at times 5 years, 6 years, and so on, with the last payment at time 10 years. Use an annual effective interest rate of 16% and an annuity-due. Question 2.9 $100 per year is received continuously from time 5 years to time 8 years. Assuming an annual effective interest rate of 4.5%, what is the accumulated value at time 10 years? Question 2.11 Payments of $5,000 are received at the end of each year for 10 years, after which payments of $1,000 are received at the end of each year forever. The annual effective interest rate is 9%. Determine the present value of these payments