(a) retrieve First and Last Names of all the Actors who are 70 years or older as of today.

(b) find all the Actors who played the role(character) of Frank Costello. For each such actor retrieve his/her First Name, his/her Last Name, and the Film Title in which (s)he acted as the role(character) of Frank Costello.

(c) find all the Actors who acted in at least one film in which Clint Eastwood has also acted. Retrieve First and Last names of these actors. (Note: the result list should not include Clint Eastwood).

Consider the following ACTORS, FILMS and ACTEDIN relations for this problem. The Primary Keys of the relations are underlined. Foreign Key Constraints are represented by arrows. ACTORS ( SSNo, FName, LName, YearOfBirth, Gender) FILMS ( Film No, FilmTitle, YearOfProduction, NumberOfPrices, Lengthin Mins) ACTEDIN ( SSNo, FilmNo, Character ) 1. Implement the following queries using the Relational Algebra