Pick six of the major elements of a contract plan below and give a very detailed description of each.

1. contract management roles and responsibilities 2. list of key contacts 3. contract management system; 4. governance structure; 5. contract documents; 6. key milestones; 7. Key Performance Indicators (KPIs) and a description of the standards or measurement process, if relevant; 8. key contract deliverables; 9. reporting requirements and lines of reporting; 10. payment procedures consistent with contractual provisions; 11. record keeping requirements and procedures; 12. audit or independent assurance requirements; 13. change management or contract variation procedures; 14. issues management and escalation; 15. key contractual remedies; 16. risk management plan; 17. stakeholder engagement plan; 18. communication plan; 19. insurance coverage, if required; 20. guarantees and/or securities, if applicable; 21. price adjustment formula and circumstances, if applicable; 22. interface management (between contractors), if applicable; 23. contract closure procedures.

Please do fast with simple explanation