Use Big$-$M method with $M=100$ to optimize:

Max $z=21+32$

$s.t.x1+224$

$x1+x2=3$

$x1,x20$

and answer the following questions

the optimal value of $z$ is

the value of $x1$ at this optimal solution is

the value of $x2$ at this optimal solution is

the row $0$ coefficient in the a $2$ column of optimal tableau i