Question 329411
Let A-H be the speed for each of his qualifying laps.
For the first 3 laps,
{{{(A+B+C)/3=92}}}
{{{A+B+C=276}}}
.
.
.
The average for all 8 laps, 
{{{(A+B+C+D+E+F+G+H)/8>=105.66}}}
.

{{{276+D+E+F+G+H=845.28}}}
.
{{{D+E+F+G+H=569.28}}}
.
.
So then the average for the last 5 laps must be,
{{{(D+E+F+G+H)/5>=113.856}}}mph