2-4. Payments of 800, 500 and 700 are made at the ends of years 2, 3 and 6 respectively. Assuming i = .13, find the point at which a single payment of 2100 would be equivalent. 2-7. In return for payments of 400 at the end of 3 years and 700 at the end of 8 years, a woman agrees to pay X at the end of 4 years and 2X at the end of 6 years. Find Xifi = .14