Question $3(30$ pts$)$

The production manger of CCB company specialized in computer manufacturing aims to design the production aggragate plan for the next $6$ months.

The expected demand and the number of productions days of each month are given in the table below.

$\backslash$table$[[$Month$,\backslash$table$[[$Expected$],[$Demand$]],\backslash$table$[[$Production$],[$Days$]]],[$Jan$,1200,22],[$Feb$,700,18],[$Mar$,800,21],[$Apr$,900,21]]$

$1$

$\backslash$table$[[$May$,1\mathrm{.}500,22],[$June$,{1\mathrm{.}100}_{?},{20}_{?}$