The following test case is to be executed to perform the Unit Testing activities.Test Case 1: Grade within rangeTest Case scope: Check the grade must be between 0 to 100Test Procedure:Login as a professor in the systemCreate a new assignmentEnter a grade of -1 for the assignment for a studentSave the entrySuccess/Failure Criteria:Success: the system does not allow the 1 grade to be saved and the user is alerted that the grade must be greater than OFailure: the system does not allow the 1 grade to be saved and the user is not alerted that the grade must be greater than OProvide 3 simple Unit test cases examples for above scenario