A diver explores a shallow reef off the coast of Belize. She initially swims d1 = 72.3 m north, makes a turn to the east and continues for d2 = 174.5 m, then follows a big grouper (a kind of fish) for d3 = 84.2 m in the direction = 43.3 degree north of east. Finally, she swims d4 = 188.4 m south.

A. What is the straight-line distance between her initial and final positions in m?

B. Suppose she wants to swim back to her initial position in a straight line. In what direction should she swim? Express your answer as an angle in degrees north of west.