Chapter 2.3B, Problem 2A

To determine

(a)

Whether the pair of sets $A-B\text{and }B-A$ are always equal.

To determine

(b)

Whether the pair of sets $A-B\text{and }A\cap \overline{B}$ are always equal.

To determine

(c)

Whether the pair of sets $B-A\text{and }B\cup A\text{ if }B\subseteq A$ are always equal.

To determine

(d)

Whether the pair of sets $B\cup \varnothing \text{ and }B\cap B$ are always equal.