This computer science problem involves algorithmic thinking and programming concepts. The solution below explains the approach, logic, and implementation step by step.
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Here are the solutions to the questions: 8. Relationship Diagram Assuming question 8 refers to the database tables and relationships created in the previous task (Students, Subjects, LabRoom tables with StudentID, SubjectID, SectionID as primary keys and foreign keys), here is a conceptual Entity-Relationship Diagram (ERD): ` +-----------------+ +-----------------+ +-----------------+ | Students | | Subjects | | LabRoom | +-----------------+ +-----------------+ +-----------------+ | StudentID (PK)|----< | SubjectID (PK)| | SectionID (PK)| | FirstName | | SubjectName | | LabRoomName | | LastName | +-----------------+ +-----------------+ | Gender | | SubjectID (FK) |----------------------------------^ | SectionID (FK) |--------------------------------------------^ +-----------------+ ` Students table has StudentID as its primary key. Subjects table has SubjectID as its primary key. LabRoom table has SectionID as its primary key. A one-to-many relationship exists between Subjects and Students (one subject can have many students). A one-to-many relationship exists between LabRoom and Students (one lab room/section can have many students). 9. Query for Product Information To create a query that displays productID, productName, and unitCost where unitCost is '100', you would use the following SQL (or steps in a database query design tool like MS Access): SQL Query: `sql SELECT productID, productName, unitCost FROM Products WHERE unitCost = 100; ` MS Access Query Design Steps: 1. Go to the "Create" tab and select "Query Design". 2. Add the Products table to the query. 3. Drag the productID, productName, and unitCost fields to the design grid. 4. In the "Criteria" row for the unitCost field, type 100. 5. Run the query to see the results. 6. Save the query with a descriptive name (e.g., ProductsWithUnitCost100). TASK 2 (Programming) Here is the Pascal code to implement the given algorithm: `Pascal Program Practici; Var i, n, Snum, product, counter: INTEGER; Begin Write('Enter three integers (i, n, Snum): '); ReadLn(i, n, Snum); product := i; counter := 1; WHILE counter <= n DO BEGIN product := product * Snum; counter := counter + 1; END; WriteLn('The product is: ', product); End. ` 3 done, 2 left today. You're making progress.