9
assume the position studi
9
7
15
14
9
9
6
14
12
10
7
11
9
13
12
9
7
13
9
14
9
8
11
10
11
11
18
13
13
8
11
6
8
11
9
10
12
10
8
7
8
7
11
11
13
11
13
9
11
11