Construct a truth table for each of the following. Determine if the statement a tautology.

a$.[p^{{?}^{?}}(pq)]q$

$[10]$

$\backslash$table$[[p,q,],[,,],[,,],[,,],[,,]]$

b$.(-p^{{?}^{?}}q)harr(pvvq)$

$[10]$

p

q

c$.(p^{{?}^{?}}q)vvr$

$[10]$

$\backslash$table$[[p,q,],[,,],[,,],[,,],[,,],[,,],[,,],[,,],[,,]]$