When a small boat travels north at 5 km/h, a flag mounted on its stern forms an angle u = 50° with the centerline of the boat as shown. A short time later, when the boat travels east at 20 km/h, angle...

When a small boat travels north at 5 km/h, a flag mounted on its stern forms an angle u = 50° with the centerline of the boat as shown. A short time later, when the boat travels east at 20 km/h, angle u is again 50°. Determine the speed and the direction of the wind.