20
assume the position studi
20
17
18
11
15
14
12
12
17
12
12
12
15
15
25
7
13
12
8
10
13
10
9
10
9
13
12
11
8
14
9
10
15
10
8
11
11
10
12
10
16
13
10
12
12
11
9
11
12