Consider the following table definition, where the primary keys are underlined. Give an expression in relational algebra for each of the following queries. Athlete (aID integer, aName string, ranking integer, age integer) Event (eID_string, eName string, eLocation string) Competes (aID integer, eID string, sport string, year integer) 1. Find the names of athletes who have competed in event 15k8P (ID = '1Sk8P') 2. Find the names of athletes who have competed in the event XGames (eName = 'XGames') 3. Find the names of the events an athlete named George competed in (aName = 'George') 4. Find the names of the athletes who have competed in at least one Event 5. Find the names of athletes who have competed in 'Dew Tour' or 'VPS' 6. Find the names of athletes who have competed in both 'Dew Tour' and 'VPS' 7. Find the aid of athletes over the age of 14 who have not competed in 'VPS' 8. Find the names of any athletes who competed in all events Consider the following table definition, where the primary keys are underlined. Give an expression in relational algebra for each of the following queries. Athlete (aID integer, aName string, ranking integer, age integer) Event (eID_string, eName string, eLocation string) Competes (aID integer, eID string, sport string, year integer) 1. Find the names of athletes who have competed in event 15k8P (ID = '1Sk8P') 2. Find the names of athletes who have competed in the event XGames (eName = 'XGames') 3. Find the names of the events an athlete named George competed in (aName = 'George') 4. Find the names of the athletes who have competed in at least one Event 5. Find the names of athletes who have competed in 'Dew Tour' or 'VPS' 6. Find the names of athletes who have competed in both 'Dew Tour' and 'VPS' 7. Find the aid of athletes over the age of 14 who have not competed in 'VPS' 8. Find the names of any athletes who competed in all events