8. The judging panel of the Young Singers Grand Prix consists of several people. Each judge gives a score to the singer, with a maximum of 10 points. After the first singer performs, the scoring situation is as follows: the average score given by all judges is 9.64 points; if the highest score is removed, the average score of the remaining judges is 9.60 points; if the lowest score is removed, the average score of the remaining judges is 9.68 points. Therefore, the lowest score given by all judges is at least $\qquad$ points, and at this time, the number of judges in the Grand Prix is $\qquad$.
Answer: $9.28,10$