public Student(int id, string firstName, string lastName, string slackHandle, Cohort cohort)
{
Exercises = new List <Exercise>();
FirstName = firstName;
LastName = lastName;
SlackHandle = slackHandle;
Cohort = cohort;
Id = id;
}
// Constructor
public Instructor(int id, string firstName, string lastName, string slackHandle, Cohort cohort, string specialty)
{
Id = id;
FirstName = firstName;
LastName = lastName;
SlackHandle = slackHandle;
Specialty = specialty;
Cohort = cohort;
}