These were all taken at 1/40
The following at 1/60
I really like 2 and 4. 2 because it's quite funny to just get her foot, and 4 because part of it is in focus and part not so it still retains the feeling of movement.
My overall favourite from the sequence in Excercise 4 and 5, on reflection is from Excercise 4 - photo number 4 as it has a lovely smooth motion blur in the skirt and hair but also gives the impression of having parts in focus. I prefer it cropped like this...