(1) The 27th straight bar is the shortest, so the 27th won the least number of gold medals. The 29 straight bar is the longest, so it means that the 29 straight bar won the most gold medals.

(2) From the statistical chart, I found that China's gold medals in the Olympic Games are on the rise, which also shows that the 29th Olympic Games will be held in Beijing, the capital of China, and the host will definitely make some money.

(3) By observing the number of gold medals in these four consecutive Olympic Games, I predict that China Olympians may win more than 40 gold medals in the 20 16 Brazil Olympic Games.

(4) Question: How many gold medals did you win in each Olympic Games on average?

(28+32+5 1+38)÷4≈37 (pieces).