Suppose you want to develop an aggregate operations plan for a product family, whose aggregate demands are given below:

$\backslash$table$[[$Period$,$Jan,Feb,Mar$],[$Demand$,210,220,190],[$Production$,,,],[$Inventory Level,,,$],[$Beginning$,,,],[$Ending$,,,]]$

Assume:

Planning horizon $=3$ months

Initial inventory $=10$ units

Target inventory level of $20$ units at the end of each month $($in chase plan$)$

Target inventory level of $20$ units at the end of planning horizon $($in level plan$)$

Same number of working days in each month

$($a$)$ In the level plan, what should be the monthly production quantity?

units

$($b$)$ In the level plan, what will be the inventory level at the end of Jan?

units

$($c$)$ In the chase plan, what should be the production quantity in January?

units