Solve the all parts of following question given below:
Question: A woman starts to swim directly across a 6.8-km-wide river. Her speed with respect to the water is 1.7 m/s. The river current carries the woman downstream at a speed of 0.91 m/s.
Part A: How much time does it take her to cross the river?
Part B: How far downstream will the river carry her by the time she reaches the other side of the river?
Please show work and steps. Do not just copy paste from the internet. Thank you.