4. $-\frac{c}{2}-6> -8$
So, the final solution is \(\boxed{c < 4}\)
Step 1 :Add 6 to both sides of the inequality: $-\frac{c}{2} > -2$
Step 2 :Multiply both sides of the inequality by -2: $c < 4$
Step 3 :So, the final solution is \(\boxed{c < 4}\)