$3\mathrm{.}3,$ Consider a resource$-$allocation problem having the following data

$\backslash$table$[[$Resource$,\backslash$table$[[$Resource Usage per Unit of$],[$Ench Activity$]],\backslash$table$[[$Amount of Resource$],[$Available$]]],[1,2],[1,2,1,10],[2,3,3,20],[3,2,4,20],[\backslash$table$[[$Contribution per$],[$unit$]],$$$20,$$$30,]]$

Contribution per unit $-$ proft per unit of the octivity

a$.$ Formulate a linear programming model for this problem on a spreadsheet.