Answer the following questions on system design

D2L allows students to submit their assignments. To submit an assignment, the student needs to select the course to which the assignment is to be submitted, and then find the assignment submission folder. Once the folder is located, the student then uploads his/her work. The system confirms the receipt of the submission. Based on the description, which of the following statements is correct? 1) "The assignment folder must exist" is a precondition for the use case Submit assignment 2) "Upload assignment" is a use case of D2L 3) "Create the receipt of a submission" is a use case of D2L 4) All of the above 5) None of the above D2L allows students to submit their assignments. To submit an assignment, the student needs to select the course to which the assignment is to be submitted, and then find the assignment submission folder. Once the folder is located, the student then uploads his/her work. The system confirms the receipt of the submission. Based on the description, which of the following statements about the domain class diagram for D2L is correct? 1) Student shall be a class in the diagram 2) The Student class shall have an attribute timeAssignmentSubmitted 3) The Student class shall have an attribute assignment 4) All of the above 5) None of the above D2L allows students to submit their assignments. To submit an assignment, the student needs to select the course to which the assignment is to be submitted, and then find the assignment submission folder. Once the folder is located, the student then uploads his/her work. The system confirms the receipt of the submission. Based on the description, which of the following statements about the domain class diagram for D2L is correct? 1) Student shall be a class in the diagram 2) The Student class shall have an attribute timeAssignmentSubmitted 3) The Student class shall have an attribute assignment 4) All of the above 5) None of the above