Table:
text: 1951 Italian Grand Prix
Race
Race
Driver Constructor_ Laps Time_retired Grid
Alberto Ascari Ferrari 80 2:42:39.3 3
José Froilán González Ferrari 80 +24.6 4
Felice Bonetto Nino Farina Alfa Romeo 79 +1 lap 7
Luigi Villoresi Ferrari 79 +1 lap 5
Piero Taruffi Ferrari 78 +2 laps 6
André Simon Simca-Gordini 74 +6 laps 11
Louis Rosier Talbot-Lago - Talbot 73 +7 laps 15
Yves Giraud-Cabantous Talbot-Lago - Talbot 72 +8 laps 14
Franco Rol OSCA 67 +13 laps 18
Juan Manuel Fangio Alfa Romeo 39 Engine 1
Maurice Trintignant Simca-Gordini 29 Engine 12
Robert Manzon Simca-Gordini 29 Engine 13
Louis Chiron Talbot-Lago - Talbot 23 Ignition 17

Question: Tell me the laps for the time/retired at +8 laps for the 1951 Italian Grand Prix?

Question: Tell me the sum of laps with a time/retirement of +13 laps with a grid higher than 18 for the 1951 Italian Grand Prix?

Question: I want the lowest laps in the 1951 Italian Grand Prix with a field of 12?