Consider a database with the following schema. LIKES(drinker,beer); /* primary key(drinker,beer) */ FREQUENTS(drinker,pub); /* primary key(drinker,pub) */ SERVES(pub,beer,cost); /* primary key(pub,beer) */ Write the following queries in standard SQL, but without using aggregate operators. 

1.) Find pubs that serve every beer that Joe likes.

Thus this means that we need to be sure that the bar serves every singlw beer that Joe likes and not just some!