Question $4$ A new semi$-$skilled operator is introduced to a repetitive assembly task. Based on prior records, the learning curve follows an $\backslash (85\backslash \%\backslash )$ rate. The first unit took $50$ minutes. $4\mathrm{.}1$ Calculate the time taken to produce the $32$nd unit using the logarithmic approach. $4\mathrm{.}2$ Graphically interpret your outcome in question $4\mathrm{.}1$ and elaborate on the shape of your graph. $4\mathrm{.}3$ Calculate the time taken to produce the $\backslash (25^\{\backslash$text $\{$th $\}\}\backslash )$ unit using the arithmetic approach. $4\mathrm{.}4$ Briefly discuss the constraints benefits of using the learning curves in labour$-$intensive industries. $4\mathrm{.}5$ Differentiate between learning and experience curves.