4
Sources
2
1
2
2
3
3
4
3
4
6
6
2
5
3
4
3
2
3
3
2
1
1
3
1
3
1
1
4
1
5
5
15K
3
6
3
3
2
6
5
5
1
1
1
6
1
0
2
0
0
