The histogram shows the number of prizes won by different numbers of students at a sports competition. Which of the following statements is correct regarding the number of students and the number of prizes won? (5 points)
Six students won 4, 5, 6, or 7 prizes.
A total of 9 students won all the prizes.
Six prizes were won by 4, 5, 6, or 7 students.
A total of 9 prizes were won by all the students.
