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Determine whether the given point is a solution of the given linear inequality
or not.
11. x > 4 ; (8, 0)
12. y < -2 ; (5, 9)
13. 2x ≥ 11 ; (-3, 1)
14. x + y < 2 ; (1,1)
15. x – y < 5 ; (-1, -2)