Relational Algebra

Relational algebra pls. Appreciate it! (Queries are detailed) Consider the following relational database that stores information about bars and Drinker (name, address) Bar (name, address) Beer (name, brewer) Frequents (drinker, bar, times a week) Likes (drinker, beer) Serves (bar, beer, price) Write the following queries in relational algebra points) tonly those bars that serve some beers they like. 5 points) Find all drinkers who frequent every bar that serves some beers they like (10 points) Find those drinkers who enjoy exactly the same set of beers as Amy