1. Solve A - k<-72 B - k<72 C - k<-70 D - k<-62

2. Solve A - x>12 B - x>-15 C - x>2 D - x>-12

3. Solve A - w≥-90 B - w≥96 C - w≥-56 D - w≥-96

4. Solve A - y≤-11 B - y≤11 C - y≤18 D - y≤-21