Table: sebastien_bourdais_2
Columns: name
team
qual_1
qual_2
best

Question: Who had the lowest Best time that also had a Qual 2 of 49.887?
SQL: SELECT MIN("best") FROM sebastien_bourdais_2 WHERE "qual_2" = '49.887'

Question: What was CTE Racing-hvm's Best with a Qual 2 of 50.312?
SQL: SELECT "best" FROM sebastien_bourdais_2 WHERE "team" = 'cte racing-hvm' AND "qual_2" = '50.312'