19
16.5, 17,18
16, 17, 18, 19,20
17
19
19
17,19
17,18
17,18
16,17
16
17
16,17
16, 17
17,18
16
16, 17,18
17
17,18
17, 18,19
16, 17
17
18
16, 17,18
16
16,17