Scrieţi elementele mulţimii:
a) A = {x | x ∈ Z, −4 < x < 5};
b) B = {x | x ∈ Z, −2 ≤ x < 7};
c) C = {x | x ∈ Z, −1< x ≤ 8};
d) D = {x | x ∈ Z, −5 ≤ x ≤ 6