Table: grand_prix_2003
Columns: driver
constructor
laps
time_retired
grid

Question: What is the total number of laps where time/retired is +2 laps and the grid number is bigger than 18?
SQL: SELECT SUM("laps") FROM grand_prix_2003 WHERE "time_retired" = '+2 laps' AND "grid" > 18

Question: What is the mean number of laps where time/retired was +1:05.564?
SQL: SELECT AVG("laps") FROM grand_prix_2003 WHERE "time_retired" = '+1:05.564'

Question: Which lap number had a grid number bigger than 9 and where the driver was Mark Webber?
SQL: SELECT "laps" FROM grand_prix_2003 WHERE "grid" > 9 AND "driver" = 'mark webber'