Please help me with the quesiton

Last school year, the student body of a local university consisted of 24% freshmen, 26% sophomores, 32% juniors, and 18% seniors. A sample of 400 students taken from this year's student body showed the following number of students in each classification. Freshmen 113 Sophomores 98 Juniors 115 Seniors 74 We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year. What is the expected number of seniors? O96 074 0128 072 0104