$2\mathrm{.}1$ Draw and label a typical bath$-$tub curve.

$2\mathrm{.}2$ Mention $3$ possible causes of failure during the break$-$in period of the bath$-$tub curve.

$2\mathrm{.}3$ A local manufacturing company, Mabogo Manufacturing Ltd$.,$ produces electronic components and faces several operational challenges. One of which is the increase in maintenance costs related to inventory management. In order to develop a plan to reduce these costs, detail five reasons why maintaining a well$-$managed inventory would help the company reduce costs.

$(5)$

$2\mathrm{.}4$ Name the four phases of the maintainability life$-$cycle that would be considered in a systems life$-$cycle.