Please Help!

Problem $7-1($Algo$)$

An analyst has timed a metal$-$cutting operation for $50$ cycles. The average time per cycle was $9\mathrm{.}3$ minutes, and the standard deviation

was $1\mathrm{.}13$ minutes for a worker with a performance rating of $113$ percent. Assume an allowance of $13$ percent of job time. Find the

standard time for this operation.

Note: Do not round intermediate calculations. Round your final answer to $2$ decimal places.

minutes