Compute each part of given problem:
Problem: In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.60m/s relative to the ground. A teammate passes the ball to him. The ball has a speed of 13.9m/s and is moving in a direction of 36.0 degree east of north, relative to the ground.
Part I: What is the magnitude of the ball's velocity relative to Juan?
Part II: What is the direction of the ball's velocity relative to Juan?
Please use as much detail as possible in your solution. Thanks.