find the indicated set operation for two sets in each number if:
U= {10,12,14,15,18,20}
S={11,12,13,14}
T={14,16,18,20}
W={8,10,12}
1. S U T
2. T U W
3. S n W
4. S n T
5. S'
6. T'
7. W'