You may want to review (Pages 86 - 90).
For help with math skills, you may want to review:
For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Flying in a crosswind.
Letting x be east and y be north, find the components of vP/E (the velocity of the plane relative to the earth).
Find the magnitude of vP/E.
Find the direction of vP/E.