Any help would be appreciated, thank you!

Apply algorithm HORN to each of these formulas:

a$.($p$$q$$w$->)($t$->)($r$->$p$)(->$r$)(->$q$)($r$$u$->$w$)($u $->$ s$)(->$ u$)$

b$.($p$$q$$s$->$p$)($q$$r$->$p$)($p$$s$->$s$)$