A stripping column is used to remove some light component from a binary mixture. Feed to the stripper is $10$ mole percent light component. Assume equimolal overflow, theoretical trays, a partial reboiler, and a constant K value. What is the maximum possible recovery of heavy component $($moles of heavy in the bottoms product from the stripper per mole of heavy in feed$)$ if the bottoms concentration is $1$ mole percent light and $($a$)$ K$=2($b$)$ K$=4$