If $P \Rightarrow (q \vee r)$ is false,then the truth values of $p, q, r$ are respectively

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.

The contrapositive of $\sim q \to p$ is equivalent to

The expression $\sim ( \sim p \to q)$ is logically equivalent to

The statement $(p \wedge (p$ $\rightarrow q) \wedge (q$ $\rightarrow r))$ $\rightarrow r$ is :

Negation of the statement "The payment will be made if and only if the work is finished in time." is