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Find the the average speed for the 1st half (15 sec) and the 2nd half (15sec)
Times
1# 5.34
2# 5.36
3# 5.07
4# 5.12
5# 5.59
Second half
6# 5.53
7# 5.33
8# 5.31
9# 5.36
10# 5.44

Position
1# 42
2# 75
3# 105
4# 135
5# 180
Second half
6# 215
7# 245
8# 285
9# 325
10# 365