Entity-relationship diagrams and how are they used? What symbol is used for a relationship? What is an associative entity? Provide an example.

Question
1. What are entity-relationship diagrams and how are they used? What symbol is used for a relationship? What is an associative entity? Provide an example.
2. Explain the difference between a LAN and a WAN
3. Explain the difference between an operational environment and a test environment?
4. What is a release methodology? Why is version control important?
5. Define a repository, and explain its role in the systems development process
Note: include intext citation. At least one page for each question.
Book used in this course for your reference: SYSTEMS ANALYSIS & DESIGN (E-BOOK) Ed:11 Yr:17

find the cost of your paper