please i want these diagrams!!

Lab Assignment - 1S244 Complete the following exercises in a group form and submit the soft copy on or before 19th April, 2022 Exercise No. 1. Consider in a super store various employees work in different departments such as inventory department, account department, human resource department, customer service department and management department. You develop a Context level diagram for this system showing the system, entities and data flows. Also design a Level diagram showing major processes. Exercise No. 2. Consider a customer selects items in a super store and puts in a trolley. When customers finishes shopping he brings trolley to the cashier. The cashier of the store picks items one by one and checks out items using a scanning device. When item is scanned price of item appears on screen and prints on printer. Some items are not scanned and cashier has to enter barcode manually to find price of the item. When all items are checked the total price appears on screen and customer pays the price and walks out of the store. You develop a Use Case diagram showing different use cases. Exercise No. 3. Consider a student would like to register for a course in a college and for this he enters his ID in order to access the courses offered in the college. The student provides the required information and select a course of his choice before submitting the application for registration. The online system verifies the information and sends a message to student for successful registration provided space is available. Otherwise, student receives a message of non-availability of space and returns to the same registration page. You develop a Sequence diagram showing the above scenario. Exercise No. 4. In a clinic patients visit and register to see a doctor for treatment. A nurse has to register patient information and checks blood pressure and temperature before referring to a doctor. A doctor checks patient and prescribes medicines that patients collects from a pharmacy. You develop a Class diagram showing different methods, attributes and relationships among classes