The structured student definition includes the following information: student ID, full name, year of birth, grade, and final score. Build functions that perform the following functions:

1. Enter a list of n students into memory.

2. Show list of n students to the screen. Every student on a line.

3. Sort students by GPA in ascending order.

4. Among the code students, the first and last name of the student with the highest total score.

5. Record in the file thilai. dat student information with a total score less than 5.