The demand for subassembly $\backslash ($ S $\backslash )$ is $100$ units in week $7.$ Each unit of $\backslash ($ S $\backslash )$ requires $2$ units of $\backslash ($ T $\backslash )$ and $1$ unit of $\backslash ($ U $\backslash ).$ Each unit of $\backslash ($ T $\backslash )$ requires $1$ unit of $\backslash ($ V$,1\backslash )$ unit of $\backslash ($ W $\backslash ),$ and $2$ units of $\backslash ($ X $\backslash ).$ Finally, each unit of $\backslash ($ U $\backslash )$ requires $2$ units of $\backslash ($ Y $\backslash )$ and $2$ units of $\backslash ($ Z $\backslash ).$ One firm manufactures all items. It takes $2$ weeks to make $\backslash ($ S$,1\backslash )$ week to make T$,2$ weeks to make $\backslash ($ U $\backslash ),1$ week to make V$,3$ weeks to make $\backslash (\backslash$mathrm$\{$W$\},1\backslash )$ week to make $\backslash (\backslash$mathrm$\{$X$\},2\backslash )$ weeks to make Y $,$ and $2$ weeks to make Z $.$

a$)$ Choose the correct product structure.

A$.$

Level

C$.$ Le

B$.$

Level

D$.$

Level b$)$ Choose the correct time$-$phased product structure.

A$.$

B$.$

C$.$

D$.$ The demand for subassembly $\backslash ($ S $\backslash )$ is $100$ units in week $7.$ Each unit of $\backslash ($ S $\backslash )$ requires $2$ units of $\backslash ($ T $\backslash )$ and $1$ unit of $\backslash ($ U $\backslash ).$ Each unit of $\backslash ($ T $\backslash )$ requires $1$ unit of $\backslash ($ V$,1\backslash )$ unit of $\backslash ($ W $\backslash ),$ and $2$ units of $\backslash ($ X $\backslash ).$ Finally, each unit of $\backslash ($ U $\backslash )$ requires $2$ units of $\backslash ($ Y $\backslash )$ and $2$ units of $\backslash ($ Z $\backslash ).$ One firm manufactures all items. It takes $2$ weeks to make $\backslash ($ S$,1\backslash )$ week to make T$,2$ weeks to make $\backslash (\backslash$mathrm$\{$U$\},1\backslash )$ week to make $\backslash (\backslash$mathrm$\{$V$\},3\backslash )$ weeks to make $\backslash (\backslash$mathrm$\{$W$\},1\backslash )$ week to make $\backslash (\backslash$mathrm$\{$X$\},2\backslash )$ weeks to make Y $,$ and $2$ weeks to make Z $.$

a$)$ Choose the correct product structure.

A$.$

L

B$.$

C$.$

D$.$

L$$