1. Write a data definition of a student records. Each student record contains the following data
Hint: Use the data definiton of date in the previous exercise.
2. Write a function, findOldest, to get the student ID of the oldest student in a list of student records.
Hint: 1) Define a list of student records
2) Wrtie a function to compare date
3. Write a function, findFirstPhone, to get the last name of the student whose has the smallest phone number from the list of student records.