$(p \wedge \sim q) \wedge (\sim p \wedge q)$ is

Which of the following is a mathematical statement?

If the truth value of the statement $p \to (\sim q \vee r)$ is false $(F)$,then the truth values of the statements $p, q, r$ are respectively:

The statement pattern $[(p \land q) \to (\sim p \lor r)] \lor [(\sim p \lor r) \to (p \land q)]$ is

The dual of the statement pattern $(p \land \sim q) \to (q \land \sim p)$ is equivalent to

Consider the following statements:
Statement $1$: If a quadrilateral is a square,then all of its sides are equal.
Statement $2$: If all the sides of a quadrilateral are equal,then it is a square.