A four$-$step process has processing

times of $3,4,7,$ and $4$ minutes for

the four steps $($listed from start to

finish$).$ After the third step, $37\%$ 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.