A wildlife researcher is tracking a flock of geese the

Question

Solve the given parts of following problem:

Problem: A wildlife researcher is tracking a flock of geese. The geese fly 4.0km due west, then turn toward the north by 40 degrees and fly another 3.5km.

Part I: How far west are they of their initial position?

Part II: What is the magnitude of their displacement?

Please show your work, so I can understand process. Thank you!