Help me with the following question.

You have been asked to review the following schema by a colleague... suggest three changes to improve it and give a reason to support each change student enrollment course StudentD nyint255) CourselD char(10) tinyint(255) char(8000) int(11) EnrollmentID StudentlD CourselD Grade int (11) int(11) int(11) char(1) FullName Name varchar(50) Age