Two friends (A and B) have planned a meeting at 9 am at their office. Friend A reached the office at 9 am according to A's watch, while B reached the office at 8:55 am according to B's watch. Yet, when B reached the office, A's watch showed 9:05 am. A argues that B's watch was slow since he drove fast, and that his time of 9:05 am is correct. Are their arguments correct? What assumptions have they made?Discuss this scenario in terms of Einstein's special relativity.

Remember to include the following information:

1. Einstein's special relativity.
2. Time dilation.
3. Length contraction.