Goran is the manager for the touring rock band Hi Phone. For the band's recently ended summer tour, Goran kept track of the attendance of each of the band's concerts. The histogram below summarizes the data. Use the histogram to answer each of the questions. Frequency (Number of concerts) 0- 9 8- 7- 6- 5. 4+ 3- 2 1 0 50 to 174 175 to 299 300 to 424 Number of people who attended 425 to 549 (a) What is the class width? [ (b) How many concerts were attended by from 300 to 424 people? (c) According to the histogram, what is the total number of concerts?