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assig 6
11
12
13
14
15

Answer: see below
Step-by-step explanation:
Note that an open dot means NOT included and a closed dot means included.
11) 1 < x < 3
(1, 3)
12) 2 ≤ x ≤ 7
[2, 7]
13) -3 < x ≤ -1
(-3, -1]
14) -3 < x ≤ 4
(-3, 4]