82. State the converse and contrapositive of the following statement.
q : I go to a beach whenever it is a sunny day. 

Write the component statements of it and use them to check whether the compound statement is true or not.
t : You are wet when it rains or you are in a river.

Check the validity of the following statement.
“Square of an integer is positive or negative”.

Show that the statement “The integer n is even if and only if n² is even’ is true.