The demand for subassembly S is $140$ units in week $7.$ Each unit of S requires $2$ units of T and $1$ unit of

U$.$ Each unit of T requires $1$ unit of V$,2$ units of W$,$ and $1$ unit of X$.$ Finally, each unit of U requires $1$ unit of Y and $3$ 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$.$

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

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

Suppose that in addition to $140$ 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 $6.$ Modify the net material requirements plan to reflect this change.

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