Table:
text: 1958 Italian Grand Prix
Classification
Classification
Driver Constructor_ Laps Time_Retired Grid
Stirling Moss Vanwall 17 Gearbox 1
Jo Bonnier BRM 14 Transmission 10
Olivier Gendebien Ferrari 4 Suspension 5
Gerino Gerini Maserati 2 Accident 19
Carroll Shelby Maserati 1 Handling 17
Wolfgang von Trips Ferrari 0 Accident 6
Harry Schell BRM 0 Accident 9
Jack Brabham Cooper - Climax 0 Suspension 15

text: 1958 Italian Grand Prix
Classification
Classification
Driver Constructor_ Laps Time_Retired Grid
Tony Brooks Vanwall 70 2:03:47.8 2
Mike Hawthorn Ferrari 70 + 24.2 3
Phil Hill Ferrari 70 + 28.3 7
Masten Gregory Carroll Shelby Maserati 69 + 1 Lap 11
Roy Salvadori Cooper - Climax 62 + 8 Laps 14
Graham Hill Lotus - Climax 62 + 8 Laps 12
Cliff Allison Lotus - Climax 61 + 9 Laps 16
Maria Teresa de Filippis Maserati 57 Engine 21
Giulio Cabianca Maserati 51 Engine 20
Jean Behra BRM 42 Clutch 8
Hans Herrmann Maserati 32 Engine 18
Stuart Lewis-Evans Vanwall 30 Overheating 4
Maurice Trintignant Cooper - Climax 24 Gearbox 13

Question: What is the time/retirement of driver Masten Gregory Carroll Shelby when the constructor was Maserati, the grid was greater than 10 and there were more than 2 laps in the 1958 Italian Grand Prix?

Question: What was the average starting grid when Vanwall was a constructor and there were 17 laps in the 1958 Italian Grand Prix?