Solve the all parts of given problem:
Problem: A woman starts to swim directly across a 7.4-km-wide river. Her speed with respect to the water is 1.3 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?
s
Part B: How far downstream will the river carry her by the time she reaches the other side of the river?
m
Please show me step by step or type in formulas used. I am so lost!!