CREATE TABLE table_name_45 (grid INT, time VARCHAR, bike VARCHAR, laps VARCHAR)

What is the average Grid for the honda cbr1000rr, with 18 laps and a time of +1:12.884?
SELECT AVG(grid) FROM table_name_45 WHERE bike = "honda cbr1000rr" AND laps = 18 AND time = "+1:12.884"
SELECT AVG("grid") FROM "table_name_45" WHERE "+1:12.884" = "time" AND "bike" = "honda cbr1000rr" AND "laps" = 18