I need cell references (not just the numbers!! PLEASE show all work! Thanks (4)

2 Solve for the unknown number of years in each of the following: 3 (Your answers should be positive.) \begin{tabular}{|r|rrrr|} \hline 4 & & & & \\ \cline { 2 - 5 } & Present value & Years & Interest rate & Future value \\ \hline 6 & $610 & & 7% & $1,389 \\ 7 & 940 & 8% & 1,821 \\ \hline 8 & 26,350 & 9% & 289,715 \\ 9 & 43,500 & 11% & 430,258 \\ \hline \end{tabular}