ER Modeling Question 1: [10 Marks] Assume your company is developing a generic digital camera online purchasing system that can be sold to different camera stores. An initial analysis phase of the project has resulted in the following informal description of relevant data for the system. A store will be selling a variety of digital cameras and lenses. The digital cameras can have following mutually exclusive optional features: 1. An ability to replace lenses. 2. Cameras with an electronic viewfinder. 3. Cameras with an optical viewfinder. 4. Cameras with an optical rangefinder. Relevant properties of all cameras are the model number, retail price and the number currently in stock. Properties of cameras without an ability to replace lenses that are relevant include a focal length range. Cameras with an ability to replace lenses are related to at least two or more lenses. Properties of a lens that are relevant include the model number, retail price and the number currently in stock. Online customers are either domestic customers or foreign customers. Properties of customers that are relevant include a unique customer number, a customer name, an email address and a shipping address. Each customer may have any number of purchase orders. Each purchase order is for only one unit of any product at a time, either a camera or a lens, and will also have a selling price. Draw an ER/EER schema diagram for this application and upload it to your submission on Crowdmark. Discuss any assumptions you make, and then justify your ER/EER design choices. You must not add any additional attributes or data requirements. Question 2: [10 Marks] Consider a database application which provides a web-based platform where students can practice on tasks assigned by the instructors. In terms of design, following are some major requirements: Instructors will first create their accounts. Relevant details for the instructors are: email, affiliation and name. Instructors will create Courses and add Students to each course. Relevant details for Courses are: course code, term and year. Relevant details for Students are: email and student ID. In Courses, Instructors will create one or more assignment and an assignment will consist of one or more tasks. Each task has a grade. Students will work on TaskSets and will be awared grade based on their submission. Winter 2023 ITEC 3220 3 Design an ER/EER schema diagram for this application and upload it to your submission on Crowdmark. Discuss any assumptions you make, and then justify your EER design choices. You must not add any additional attributes or data requirements. Mapping from ER to Relational Model Questions 3-4: [10 x 2 Marks] Convert the ERDs in questions 1-2 to logical relational schema. Draw the schema using the approach used in Figure 5.7 in the book i.e., relations, attributes, keys, foreign keys must be properly indicated. Upload these schemas to your submission on Crowdmark. Questions 5-6: [10 x 2 Marks] Write the SQL code to create relational schemas from questions 3-4 in your MySQL database. To indicate the success of these steps you need to perform following actions for each of the question: Submit the code/script for each schema creation separately to your submission on Crowdmark. Run these scripts on your MySQL server, one by one, using the run script file option. Show the list of tables (there should be none) before the above scripts are executed using SHOW TABLES and upload the screenshot to your submission on Crowdmark. You need to do this step only once and then reuse the image for both the questions, 5-6. Show the list of tables after the two schema creation scripts are executed using SHOW TABLES and upload the screenshot to your submission on Crowdmark. You may do this step only once and then reuse the image for both the questions, 5-6. DESCRIBE statement can be used to see the schema of a table as shown in the example below: o DESCRIBE all the tables from the two questions, one by one, and upload the screenshots to your submission on Crowdmark. Do this separately for each question and upload the screenshots to the appropriate question space.