Solve the open sentence.
–2 ≤ n + 4 ≤ 7
a.n ≥ 6 and n ≤ –4
b.n ≤ 2 and n ≤ 7
c.n ≤ –6 and n ≤ 4
Dn ≥ –6 and n ≤ 3
–2 ≤ n + 4 ≤ 7
a.n ≥ 6 and n ≤ –4
b.n ≤ 2 and n ≤ 7
c.n ≤ –6 and n ≤ 4
Dn ≥ –6 and n ≤ 3