truth table

[silverpef]

Can anyone help me out with the following?
-p<->q
(p->q)v(-p->q)
(p->q)^(-p->q)
(p<->q)v(-p<->q)
(-p<->-q)<->(p<->q)

 

[modus]

What seems to be the trouble? Do you have any idea how to begin constructing a truth table? Do you know what a truth table is?