The statement $[p \wedge (q \vee r)] \vee [\sim r \wedge \sim q \wedge p]$ is equivalent to

Let $A, B, C$ and $D$ be four non-empty sets. The contrapositive statement of "If $A \subseteq B$ and $B \subseteq D,$ then $A \subseteq C$" is

The negation of the statement pattern $p \vee (q \rightarrow \sim r)$ is

The inverse of the proposition $(p \wedge \sim q) \rightarrow r$ is:

Consider the following statements:
$r$: If $p \to q$ is false then $p \lor q$ is false.
$s$: If $p \leftrightarrow q$ is false then $p \lor q$ is false.
The truth values of $r \to s$ and $s \to r$ are respectively . . . . . .

The converse of the statement "If $p < q$,then $p - x < q - x$" is -