compute variable in spss

5:13

6:01

2:23

10:05

11:20

26:27

5:14

24:47

3:11

21:09

14:09

20:13

7:21

5:58

3:12

2:29

3:45

11:51

9:05

5:39

1:14

5:04

2:50

9:05

5:44

17:55

5:06

13:47

4:06

3:54

3:51

3:42

3:26

5:14

3:07

5:04

6:24

19:34

2:15

2:15