The demand for subassembly $S$ is $100$ units in week $7.$ Each unit of $S$ requires $1$ unit of $T$ and $1$ unit of $U.$ Each unit of

$T$ requires $2$ units of $V,2$ units of $W,$ and $1$ unit of $x.$ Finally, each unit of $U$ requires $1$ unit of $Y$ and $2$ units of $Z.$ One

firm manufactures all items. It takes $2$ weeks to make $S,1$ week to make T$,2$ weeks to make $U,2$ weeks to make $V,$

$3$ weeks to make W$,1$ week to make X$,2$ weeks to make $Y,$ and $1$ week to make $Z.$

Click the icon to view the product structure and the time$-$phased product structure.

Click the icon to view the on$-$hand inventory.

Suppose that in addition to $100$ units of $S,$ there is also a demand for $30$ units of $U,$ which is a component of $S.$ The

$30$ units of $U$ are needed for maintenance purposes. These units are needed in week $6.$ Additionally, a new order has

been received for $80$ units of $S$ due in week $8.$ Modify the net material requirements plan to reflect these changes.

Construct a new net material requirements plan $($enter your responses as whole numbers$).$