Study figure Q$2$ carefully and answer the questions that follow.

$($i$)$ Explain, using examples, the difference between supper$-$class and sub$-$class entities

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Figure Q$2$: E$-$R diagram

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$($ii$)$ Using examples, explain fully the two main types of relationships shown in FigQ$2.$

$($iii$)$ Convert Figure Q$2$ into an IDEFIX model.

is important in the design of manufacturing