Can anyone help with this difficult math problem please?

Question

A. Minimize Z=X+3y
subject to the constraints x+y < or equal to 10
5x+2y > or equal to 20
-x+2y > or equal to 0
x > or equal to 0
y > or equal to 0

B. Maximize Z=2x+2y Subject to the constraints:
x-y < or equal to 10
5x+3y < or equal to 75
x+y < or equal to 20
x> or equal to 0
y> or equal to 0

Answer 1

Graph all the lines. For A, pick the ordered pair that gives you the smallest solution to Z. For B, pick the ordered pair that gives you the greatest solution to Z