Question: Answer the following questions.
1. Describe three-tier architecture. Explain the functions performed by each tier.
2. What is a conceptual model? Explain its importance. Conceptual models are typically made up of three main parts. Name these parts giving a full definition and purpose. Give two possible examples of each part.
3. Describe the insert problem caused by a denormalized design.
4.Describe what the term data redundancy means in database design. Explain if it is bad and if a normalized database design is always the best design. Discuss the pros and cons of a normalized database.