can you explain the first part, why is this the case? i got the second part.

Question 1: This is a two part problem. The following series of payments will repay a present sum of $6000 at an 8% interest rate. First, explain why this is the case. Second, find the present sum that is equivalent to this series of payments with a 10% interest rate (i.e., apply discount factors to determine the NPV of the future payments at a 10% interest rate). Year cor Com 1 2 3 4 5 6 End-of-Year Payment $ 1480 1400 1320 1240 1160 1080