A cash flow at time zero​ (now) of ​$ is equivalent to another cash flow that is an EOY annuity of ​$ over years​ (starting at year​ 1). Each of these two​ cash-flow series is equivalent to a third​ series, which is a uniform gradient series. What is the value of G for this third series over the same ​-year time​ interval? Assume that the cash flow at the end of year one is zero.