QUESTION $4$

$4\mathrm{.}1$ Differentiate between Unit Load Storage Equipment and Unit Load Retrieval Equipment.

$4\mathrm{.}2$ Explicate the three major categories of Unit Load Retrieval Equipment and for each category cite and describe two equipment examples.

$4\mathrm{.}2$ Explain the Just$-$In$-$Time $($JIT$)$ production philosophy and detail each of its five elements.

$(8)$

$[21]$