write relational algebra expressions for the following queries

Consider the following schema: Movie (title, year, length, inColor, studiName, producerC#) Starsln (movie Title, movieYear, starName) MovieStar(name, address, gender,birthdate) MovieExec(name, address, cert#, new/orth) Studio (name, adress, presC#) Write relational algebra expressions for the following queries. a. Which stars appeared in movies produced by MGM IN 1995? b. Find the producers of Harrison Ford's movies. (Hint: All producers are movieExcs.) (a) Given the following D8 C?ty, stat,ipoga) ?.:::ndem Customer (Id, Company, First Name, Last Name, street, Book (isEN, Title, Price, Authors, Pges, PbDate, Qty) order(rder D Cu?t mrlDQ derDate Ship Date, Shipping ?tat Ted Order lnfo (Order ID, ISBN, Oty, Pri?e) --, ,?26 , Write relation?l algebra expressions for: di) i Determine all the customers (Last Name, First Name), who bought more thah two copies/ofa book before November 13,2009 Determine all the titles of the books which cost more than $100and were shipped befo December 31, 2009