(1 point) Problem 3 -Unknown Time & Unknown Interest Rate At an effective annual interest rate of 7%, the following two streams of payments are equivalent (i) A payment of 300 at the end of the first year, a payment of 400 at the end of the 6th year, and a payment of 700 at the end of the 9th year. (i) A single payment of 1400 at time T Calculate the time of the single payment. T