I need help understanding how to solve these types of problems:

A plane is heading due north but finds the direction of travel to be N5*12'E. The planes air speed is 315mi/hr and wind is from west. Find the planes ground speed and speed of the wind?

At what speed with respect to the water should a boat head due north in order to follow a course of N5*15'E if a current is flowing due east at a rate of 10.6mph?

Thanks