Find the APR, or stated rate, in each of the following cases:

I dont get how to do the last one with "infinite"

\begin{tabular}{|c|c|c|} \hline Input area: & & \\ \hline Output area: \\ \hline \multicolumn{1}{|l|}{ Compounding periods per year } & Effective rate (EAR) & Stated rate (APR) \\ \hline 2 & 14.20% & 13.73% \\ \hline 12 & 18.40% & 17.01% \\ \hline 52 & 11.10% & 10.54% \\ \hline \end{tabular}