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$,335,200,140,440,300,200]]$

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

b$.$ Compare the holding and setup costs obtained over the six periods using the Silver$-$Meal heuristic with the cost of a lot for lot policy