Find the max and min value of the given linear expression subject to the given constraints.
"_>" greater than or equal
"_<" less than or equal
A. x _>0 B. -2_<x_<5
y_>0 3_<y_<8
3x+4y<17 6x-7y>-42
3x-2y<2 5x+2y_<40
5x-2y 3x-y+8

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