e demand for subassembly S is $130$ units in week $7$ Each unit of S requires $1$ unit of T and $2$ units of U$.$ Each unit of T requires $1$ unit of V$,1$ unit of W$,$ and $2$ ch unit of U requires $2$ units 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$,1$ week eeks to make W$,1$ week to make X$,2$ weeks to make Y$,$ and $2$ weeks to make ZClick the icon to view the product structure and the time$-$phased product structuread More Info 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 week $6.$ Modify the gross material requirements plan to reflect this change $($type $0$ if the input box is not used$)$ItemGross reqS$1$Order releaseWeek$234567$Lead Time $($weeks$)$Gross req$21$Order releaseU$2$VGross reqOrder releaseGross reqT