$($P$\mathrm{.}1-10)$ From Questions $1$ to $10,$ please refer to the following linear programming problem and

the corresponding chart to answer your questions.

$=1+2$

Subject to:

$81+32>=20(=$ b$1)[1]$

$21+52>=20(=$ b$2)[2]$

$1<=5(=$ b$3)[3]$

$2<=5(=$ b$4)[4]$

$1,2>=0[5,6]$

$1.(1$ pt$)$ Select all the corner point feasible $($CPF$)$ solutions.

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$2.(1$ pt$)$ Select the optimal CPF solution.

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$3.(2$ pts$)$ Plot any two of the Z lines and identify the Z$-$increasing direction.

$4.(1$ pts$)$ Identify the optimal value for the Z$.$

$=$

$5.(2$ pts$)$ Select binding constraint$($s$).$

$[1][2][3][4][5][6]$