A class grade application for instructors assigns letter grades based on students’ numerical grades. The letter grades for different numerical grades should be:


Above 89, up to 100 - A -

Above 79, up to 89 - B -

Above 69, up to 79 - C -

Above 59. up to 69 - D -

Below 60 - F -

Which of the following sets of test inputs would achieve the relatively highest equivalence partition coverage?