Contrapositive of the statement

‘If two numbers are not equal, then their squares are not equal’, is :

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

The following statement

$$\left( {p \to q} \right) \to \left[ {\left( { \sim p \to q} \right) \to q} \right]$$ is :

The contrapositive of the following statement,

“If the side of a square doubles, then its area increases four times”, is :