Problem
The Stevens College Testing Center creates a record each time a student takes a placement test. Students are tested in any of 12 subject areas: Art, Biology, Chemistry, Computer Science, English, German, History, Math, Music, Psychology, Sociology, or Spanish. Each record contains the student's ID number, the test subject area, and a percent score on the test. Records are maintained in the order they are entered as the tests are taken. The college wants a report that lists each of the 12 tests along with a count of the number of students who have received scores in each of the following categories: at least 90 percent, 80 through 89 percent, 70 through 79 percent, and below 70 percent. Develop the logic that produces the report.