p	q	p q
T	T	F
T	F	T
F	T	T
F	F	T

p	q	p q
T	T	F
T	F	F
F	T	F
F	F	T

Show:	a.	( p q ) ( p q ) is logically equivalent to p q, i.e. ( p q ) ( p q ) p q.
	b.	the logical operator is not associative, i.e. ( p q ) r is not equivalent to ( p ( q r ).

Given the logical operators NAND denoted by and NOR denoted by .