question: what is the maximum round for gt3 winner hector lester tim mullen and pole position of jonny cocker paul drayson
answer: SELECT MAX(round) FROM table_13079788_3 WHERE gt3_winner = "Hector Lester Tim Mullen" AND pole_position = "Jonny Cocker Paul Drayson"
context: CREATE TABLE table_13079788_3 (round INTEGER, gt3_winner VARCHAR, pole_position VARCHAR)