d$.$ Design engineers argue with marketing about the proper design specifications

Question $25$

$2$ pts

Given a mean of $5,$ an upper specification limit of $7,$ a lower specification limit of $4,$ a target of $5\mathrm{.}5,$ and a standard deviation of $.26,$ calculate the Cpk $($use $3$ standard deviations in the calculation$).$

a$.1\mathrm{.}282$

b$.888$

c$.3\mathrm{.}333$

d$.1\mathrm{.}788$

e$.\mathrm{.}999$