Solve the all parts of given question:
Question: A person walks in the following pattern: 3.4 km north, then 2.6 km west, and finally 4.5 km south.
Part A: How far would a bird fly in a straight line from the same starting point to the same final point?
Part B: At what angle would a bird fly in a straight line from the same starting point to the same final point? (Measured counterclockwise from east)
Please explain how you came to your conclusion.