Q2: Draw a use-case diagram and a set of activity diagrams for the process of buying glasses from the viewpoint of the patient. Th e first step is to see an eye doctor who will give you a prescription. Once you have a prescription, you go to an optical dispensary, where you select your frames and place the order for your glasse for a fitting and pay for the glasses. Q3: Create a set of detailed use-case descriptions for the process of buying glasses in exercise