Table:
text: 2005 Malaysian Grand Prix
Classification
Qualifying
Pos No_ Driver Constructor_ Laps Time_Retired Grid Points_
11 19 Narain Karthikeyan Jordan-Toyota 54 +2 Laps 17 
12 18 Tiago Monteiro Jordan-Toyota 53 +3 Laps 18 
13 21 Christijan Albers Minardi-Cosworth 52 +4 Laps 19 
Ret 2 Rubens Barrichello Ferrari 49 Handling 12 
Ret 6 Giancarlo Fisichella Renault 36 Collision 3 
Ret 7 Mark Webber Williams-BMW 36 Collision 4 
Ret 11 Jacques Villeneuve Sauber-Petronas 26 Spun Off 16 
Ret 3 Jenson Button BAR-Honda 2 Engine 9 
Ret 4 Anthony Davidson BAR-Honda 2 Engine 15 
Ret 20 Patrick Friesacher Minardi-Cosworth 2 Spun Off 20

Question: How many drivers retired from the 2005 Malaysian Grand Prix before the race was completed?

Question: How many drivers retired due to engine problems at the 2005 Malaysian Grand Prix?