Table:
text: 2007 Australian motorcycle Grand Prix
MotoGP classification
MotoGP classification
Rider Manufacturer Laps Time_Retired Grid
Kurtis Roberts KR212V 27 +1:13.020 19
Nicky Hayden Honda 8 Retirement 4
Chaz Davies Ducati 8 Retirement 17

Question: What is the average starting grid with a number of laps less than 8 for the 2007 Australian Motorcycle Grand Prix MotoGP classification?