Answer:
cardinality
n(V)=5
n(W)=3
subsets
V=2^5=32 sets
W=2^3=8 sets
V subsets - a , e , i , o , u , ae, ai , ao , au , ei , eo , eu , io , iu , ou , eio , eiu , eia , aou , iou , ua , uai , ueu , oeu , uia , oia , oue , uei , oai , iau , oea , oui , uea ! REMINDER do put parentheses for each subset ex':{a} , {e} !
W subsets - a , r , t , ar , at , rt , rat , tra , art
! same reminder as V !