How many average points one have done team Minardi Team USA have when there have been one grid 3 and more laps 68?
Driver Team Laps Time/Retired Grid Points
2007 Vegas Grand Prix
10506557
text text real text real real
2-10506557-3
Race
Race
Will Power Team Australia 68 1:45:13.637 1 34
Robert Doornbos Minardi Team USA 68 +16.789 3 27
Paul Tracy Forsythe Racing 68 +27.356 2 27
Alex Tagliani RSPORTS 68 +48.981 4 24
Tristan Gommendy PKV Racing 68 +1:10.396 11 21
Katherine Legge Dale Coyne Racing 68 +1:21.261 13 20
Bruno Junqueira Dale Coyne Racing 66 + 1 Lap 6 18
Alex Figge Pacific Coast Motorsports 63 + 5 Laps 17 15
Mario Dominguez Forsythe Racing 57 + 11 Laps 7 13
Neel Jani PKV Racing 56 Mechanical 9 11
Ryan Dalziel Pacific Coast Motorsports 52 + 16 Laps 15 10
Simon Pagenaud Team Australia 47 Engine 5 9
Sébastien Bourdais N/H/L Racing 30 Accident 16 8
Justin Wilson RSPORTS 20 Input shaft 8 7
Dan Clarke Minardi Team USA 13 Accident 12 6
Matt Halliday Conquest Racing 3 Accident 14 5
Graham Rahal N/H/L Racing 1 Accident 10 4
SELECT AVG Points FROM table WHERE Team = minardi team usa AND Grid = 3 AND Laps > 68
minardi team usa 3 68