. (16 points total) State the conditions for which each of the following is true. \text { (a) (2 points) } A \cup B=A \text { (b) (2 points) }

B-A=B \text { (c) (2 points) } A-B=B-A \text { (d) (2 points) } A \cap B=A \text { (e) (2 points) } A \cap B=B \cap A \text { (f) (2 points) } \bar{A} \cap U=\emptyset \text { (g) (2 points) } A-B=\emptyset \text { (h) (2 points) } A \cap B=A-B