Without knowing the exact way your text defines statement it hard to judge the I above. For example some would say the 4 is an X because it in neither true or false.
In II I agree with 1. & 3. But for 2. \(\neg(p\wedge q)\).
As you should, this is the implication truth table:
\(\begin{array}{*{20}{c}}
p&q&{p \to q} \\ \hline t&t&t \\ t&f&f \\ f&t&t \\ f&f&t \end{array}\)
By looking at that table, consider these two statements.
A true statement is implied by any statement.
A false statement implies any statement.