i. Set up obstacles in the swing board obstacle race and use swing board skills to avoid obstacles and reach the finish line. This competition adopts a group of three people, with three advances and one elimination round. The second round of the final will be divided into 1, 2, and 3 places. Ii. The gliding racing competition is divided into men's and women's groups. Slide 25 meters and turn back (no more than 5 kicks in each direction), and the first one to reach the starting point wins. Four people in a group, the first round consists of four groups, and the top two will be selected for the second round. In the second round, there are two groups of eight people, and the first place in each group will be selected for the final. Iii. Die Die Le draws lots and randomly divides into groups of three. Teammates use ❼ skateboards to participate in a height stacking competition. The group with the highest height wins, and the competition lasts for one round, with a total of five groups competing simultaneously. Who is this year's Olympic champion? (Beating the ground with a skateboard to answer)