If the Boolean expression $( p \Rightarrow q ) \Leftrightarrow( q *(\sim p ))$ is a tautology, then the Boolean expression $p *(\sim q )$ is equivalent to

The contrapositive of $(p \vee q) \Rightarrow r$ is

Contrapositive of the statement 'If two numbers are not equal, then their squares are not equal', is

The following statement $\left( {p \to q} \right) \to $ $[(\sim p\rightarrow q) \rightarrow  q ]$ is

For any two statements $p$ and $q,$ the negation of the expression $p \vee ( \sim p\, \wedge \,q)$ is 

The statement $( p \wedge q ) \Rightarrow( p \wedge r )$ is equivalent to.