(Solved): 4. Give a relational algebra query plan drawn as a tree that correctly computes the following query ...

4. Give a relational algebra query plan drawn as a tree that correctly computes the following query. SELECT a.name, p.title, r.character_name FROM Actor a, Play p, Roler Where a.name= p.author AND a.actor_id = r.actor_id AND p.play_id = r.play_id 5. What the output of the following query? SELECT name From STORE where job=' manager' first create a table: create table STORE(Name yarchar(10), Salary int, Job yarchar(10)); And insert into STORETable: insert into STORE values(' John', 20000 , 'mgr'); insert into STORE values(' Kyle', 2500, 'Dr'); insert into STORE values(' James', 50000,' mgr' $${}^{?})$$; insert into STORE values(' Wiliam', 30000, 'IT');