Negation of $(p \Rightarrow q) \Rightarrow(q \Rightarrow p)$ is

The statement $A \rightarrow( B \rightarrow A )$ is equivalent to

Which Venn diagram represent the truth of the statement“Some teenagers are not dreamers”

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

Let $p , q , r$ be three statements such that the truth value of $( p \wedge q ) \rightarrow(\sim q \vee r )$ is $F$. Then the truth values of $p , q , r$ are respectively