Consider the following linear program. Max $3$A $+2$B s$.$t$.1$A $+1$B A $+1$B A $+2$B A$,$ B $>=0$ Consider the following linear program:

Max $3$A$+2$B

s$.$t$.$

$1$A$+1$B

$3$ A $+1$ B

$1$A$+2$B

$A,B0$

a$.$ Use the graphical solution procedure to find the optimal solution.

d$.$ The computer solution for the linear program in part $($a$)$ provides the following objective coefficient range information:

Use this objective coefficient range information to answer parts $($b$)$ and $($c$).$