Working it out

1 min 18 secs

5 mins 11 secs

5 mins 14 secs

1 min 53 secs

1 min 24 secs

1 min 59 secs

6 mins 59 secs

5 mins 37 secs

2 mins 50 secs

9 mins 15 secs

15 secs

34 secs

2 mins 18 secs

6 secs

2 mins 32 secs

1 min 48 secs

3 mins 34 secs

3 mins 45 secs

1 min 58 secs

6 mins 7 secs

1 min 12 secs

6 mins 10 secs

1 min 10 secs

20 secs

8 mins

10 secs

1 min 52 secs

1 min 20 secs

8 mins 30 secs

1 min 31 secs

6 mins 2 secs

3 mins 15 secs

1 min 42 secs

11 mins 20 secs

8 mins 47 secs

3 mins 31 secs

35 secs

14 mins 53 secs

2 mins 16 secs

8 mins 24 secs