Number of students: 20.
Oscar Mathieson has the highest GPA of 3.92.
Gilbert Poothananny has the lowest GPA of 1.92.
Average GPA: 2.92.
Number of students with a GPA less than 2.0: 2.
Number of students with a GPA of 3.5 or higher: 6.
Sorted data written to gpa-sorted.csv.