Two sections of each class are given a quiz, which has a total of ten questions. Each question is worth 1 point. The distributions of the scores are as follows:

Score 10 9 8 7 6 5 4 3 2 1 0
# of students in Section A 2 7 6 4 3 0 1 0 0 1 0
# of students in Section B 0 1 2 4 7 3 3 1 0 0 0

For example, 2 students in Section A received 10 points while no student in Section B received 10 points; 7 students and 1 student in Section A and B, respectively received 9 points. What are the modes of the scores in Section A, and Section B?