A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results

Machine Measurements

#$117151517$

#$216251825$

#$323242322$

For upper and lower control limits of $23\mathrm{.}29$ and $16\mathrm{.}71,$ which machine$($s$),$ if any, appear$($s$)$ to have an out$-$of$-$control process mean?

Group of answer choices

machine #$1$

machine #$2$

machine #$3$

all of the machines

none of the machines