Negation of statement "If I will go to college, then I will be an engineer" is -

The Boolean expression $\left( {\left( {p \wedge q} \right) \vee \left( {p \vee  \sim q} \right)} \right) \wedge \left( { \sim p \wedge  \sim q} \right)$ is equivalent to

Which of the following is logically equivalent to $\sim(\sim p \Rightarrow q)$

The contrapositive of the statement "If it is raining, then I will not come", is

If the Boolean expression $( p \wedge q ) \circledast( p \otimes q )$ is a tautology, then $\circledast$ and $\otimes$ are respectively given by

The Boolean expression $ \sim \left( {p \Rightarrow \left( { \sim q} \right)} \right)$ is equivalent to