Additional Algo $5-14$ Rework

A four$-$step process has processing times of $5,4,7,$ and $3$ minutes for the four steps $($listed from start to finish$).$ After the third step, $32\%$ of items require rework, which entails starting over again at step $1.$ All items that are reworked are successfully processed. Demand is $10$ units per hour.

How many units per hour will the second step process?

Note: Round your answer to $2$ decimal places.