A process uses statistical process control. The mean of all sample means is $45$ units. The mean of all sample ranges is $2\mathrm{.}2$ units. There were $10$ samples taken each with $4$ observations. Calculate the upper control limit for the R chart.

Question $17$Select one:

a$.$

$3\mathrm{.}916$ units

b$.$

None of these answers are even close

c$.$

$0$ units

d$.$

$4\mathrm{.}400$ units

e$.$

$5\mathrm{.}016$ units