00 on t=1 through 3 and 6 through 9 considering an interest rate of 2.

Engineering economicsI need help with the following problemcompute the worth at t=5 of a series of deposits of $100.00 on t=1 through 3 and 6 through 9 considering an interest rate of 2.5% per period.The answer is 699.33 but im not getting that answer. I greatly appreciate if you can help me