One day, you are rollerblading on a trail while it is windy. You travel along the trail, turn around and come back to your starting point. On you way out on the trail, you are rollerblading against the wind. On the return trip, you are rollerblading with the wind. You can only travel 3 miles an hour against the wind, which is blowing at a constant speed. You travel 8 miles per hour with the wind. Find your average speed with no wind and the speed of the wind.