Which of the following is not a statement?

If $p$ : the function $f(x) = x$ is an even function,$q$ : ${}^nC_m$ is a whole number wherever defined,and $r$ : if $\overrightarrow{c} = \overrightarrow{a} + \lambda \overrightarrow{b}$,then the vectors $\overrightarrow{a}, \overrightarrow{b}$,and $\overrightarrow{c}$ are linearly dependent. Which one of the following statements is true?

$\sim[(p \vee \sim q) \rightarrow (p \wedge \sim q)] \equiv$

$\sim(\sim p \rightarrow q) \equiv$

Which of the following are pairs of equivalent circuits?

Show that the following statement is true by the method of contrapositive.
$p:$ If $x$ is an integer and $x^{2}$ is even,then $x$ is also even.