P1 P2 P3

P(1) TheOpportunisticCompany Pvt. Ltd. is designing an online examination system, hoping to take advantage of the current pandemic. Their idea to leverage the current advances in Natural Language Processing to optionally automate marking. P(2) The system will require teachers to supply questions and answers for an examination. Currently, three types of questions are supported, MCQs, Questions with descriptive answers, and Questions requiring mathematical reasoning. For MCQs, teachers simply indicate which answers are correct. For descriptive questions, teachers must supply multiple answers, each carrying a different mark. For questions requiring mathematical reasoning, teachers supply the correct answer as well as the text of the workings. As you can imagine each question type has one or more evaluation algorithms associate with it. In the future, new question types may be introduced. P(3) Once the teacher sets up an examination, he/she has to associate a list of students with the examination. Students take the examination and the system automatically does the marking using the appropriate algorithms per question type. The marking is done after the examination finishing time is over and the teacher is sent a notification.

1. Draw a UML class diagram for the model classes of the system