Describe the major activities that take place during the planning phase of a technical project

The following are the questions, please make the answer comprehensive, try to cover the points as much as possible. I have uploaded a very important word document, please read the document before writing, especially the pictures in the word document. the PDF document is from the professor, some content may be helpful.I also did some research for and found some points for some questions and put them in the document, which may be helpful for you.Questions:1. Describe the purpose of the post-deployment support periodduringtheExecution/ImplementationPhaseof a technical project.2. Describe the purpose of the business case in a technicalproject.3. Describethe purpose of the System Architecture Document in atechnical project.4. Describe the major activities that take place during the initiation phase of a technical project.5. Describe the major activities that take place during the planning phase of a technical project.6. Describe the purpose of executing the test plan duringtheExecution/ImplementationPhaseof a technical project.7. Describethe purpose of aRACI matrix or chartin atechnical project.8. Describethe purpose of the Requirements Documentsin atechnical project.9. Describe the purpose of executing the training plan duringtheExecution/ImplementationPhaseof a technical project.10. Describe the major activities that take place during the Requirements and Design Phaseof a technical project.11. Describe the role of5subject matter experts that are often assigned to atechnical project.12. Describe the major activities that take place during the Execution/Implementation Phaseof a technical project.