Instruments in an airplane which is in level flight indicate that the velocity relative to the air

Question:

Instruments in an airplane which is in level flight indicate that the velocity relative to the air (airspeed) is 120 km/h and the direction of the relative velocity vector (heading) is 70? east of north. Instruments on the ground indicate that the velocity of the airplane (ground speed) is 110 km/h and the direction of flight (course) is 60? east of north. Determine the wind speed anddirection.