O State the conditions for which each of the following is true. A \cup B=A \quad B \subseteq A B-A=B A-B=B-A \text { at) } A \cap B=A A \cap B=B \cap A \text { t) } A \cap U=\varnothing A-B=\varnothing A \cap B=A-B

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5

Fig: 6

Fig: 7

Fig: 8

Fig: 9