v -h summer, track and field athletes from all over the world represent their country by competing in the Sekai Games. At the end of last year's games, the wiricial record keeper counted the number of gold medals won by each country in that year's games. The histogram below summarizes the data. Use the histogram to answer each of the questions. Frequency (Number of countries) 3tob 7t010 11to 14 15to 18 Number of gold medals (a) what is the class width? 4 (b) How many countries won 14 or fewer gold medals