Question $2[15$ points $(8+7)]$

You are given two propositional logic formulae. Identify whether they are correct

$($well$-$formed$)$ as per the grammar of propositional logic. If yes, provide an assignment

to the variables of that formula so that the formula evaluates to $$False$.$ If not, rewrite the

formula by changing exactly one symbol in the formula to anything of your choice so

that the formula becomes grammatically correct.

a$)($P $$ Q$)->(($R $$ S$)($T $$ U$))$

b$)($X $->$ Y$)($Z $$ W$)($A $$ B$)$