A golfer takes three putts to get the ball into the hole. The first putt displaces the ball 3.48 m north, the second 1.54 m southeast, and the third 0.982 m southwest. What are(a) the magnitude and(b) the angle between the direction of the displacement needed to get the ball into the hole in just one putt and the direction due east?

I am really having problems with this one. Can someone show step by step process of solving this problem?

I am SAS btw.