MARR of 5%

Whats the incremental rate ( whole number )?

Which alternate should you isw (A or B)

\begin{tabular}{crr} Year & \multicolumn{1}{c}{ A } & \multicolumn{1}{c}{ B } \\ \hline 0 & $10,000 & $15,000 \\ 15 & 3,200 & 4,500 \\ \hline \end{tabular}