The intensive care unit lab process at UTMC has an average turnaround time of $26\mathrm{.}2$ minutes and a standard deviation of $1\mathrm{.}35$ minutes The nominal value for this service is $25$ minutes with an upper specification limit of $30$ minutes and a lower specification limit of $20$ minutes The Cpk is:

$0\mathrm{.}94$

$1\mathrm{.}53$

$1\mathrm{.}23$

$1\mathrm{.}39$