Question $2$: Given an optimal simplex tableau of a maximization problem and all $$ constraints and $x_4,x_5,x_6$ are slack variables.

$\backslash$table$[[$Basic$,Z,x_1,x_2,x_3,x_4,x_5,x_6,\backslash$table$[[$Right$],[$Side$]]],[Z,1,0,0,0,4,0,6,$