Question $5(10$ points$)$: Lot$-$Sizing Problem

The time$-$phased net requirements for the base assembly in a table lamp over the next six weeks are

$\backslash$table$[[$Week$,1,2,3,4,5,6],[$Requirements$,335,200,140,440,300,200]]$

The setup cost for the construction of the base assembly is $$300,$ and the holding cost is $$0\mathrm{.}50$ per assembly per week.

a$)$ Determine the lot sizes using the Silver$-$Meal heuristic.

b$)$ Determine the lot sizes using the least unit cost heuristic.