1. Competition scoring method: average.

In the U-pool competition, after a snowboarder skated, five judges gave 8 1, 89, 83, 88 and 84 points respectively, excluding the highest and lowest points. What is the skier's final score?

2. Why do you want to "wipe the floor" desperately in curling competition?

Curling competition is a competition between two teams, each with four people. The two teams take turns pitching, not only to let their curling reach the center of the camp, but also to keep each other's curling away from the center of the circle.

In order to reduce the friction between curling and ice, water droplets will be sprayed evenly on the ice before the game, but the surface of curling track is not as smooth as a mirror, and a slight bump will change the trajectory and speed of curling.