Assume the 2018 enrollment records for Stockholm University showed that 55% of applicants were for the business program, 25% for the science program, 10% for the law program, and the rest for other programs. In the current enrollment record, the university found that out of 1,500 enrollments, 850 are for the business program, 350 for the science program, 155 for the law program, and the rest for other programs. 

a. Explain why goodness-of-fit test is suitable to use for the above situation.

b. State the null and alternative hypothesis for conducting a goodness-of-fit test.

c. Are the enrollments for the previous and the current enrollment record the same at the 1% level? Give a reason for your conclusion.