6. There are systems in the Development and Production. The development systems DS have lower integrity level than the production systems PS. The integrity level of PS is higher than that of DS. Consider the rights r (read), w (write) and m (manage). Programmers can read, and write to the Development systems, while System Administrators have all rights on both Development and Production systems. a. Define the subjects, objects and the access control matrix. b. Are the read and write rules in Bibas integrity model satisfied? Explain. c. Programmers need to troubleshoot a problem in the Production systems. The System Administrators create a new process p in the Production Systems to copy data related to the problem and write to the Development Systems. (1) Update the access control matrix with process p. (2) Is Bibas integrity model still satisfied? Explain. d. Can the situation in c) above violate Bell-Lapadula confidentiality model? How would you propose to fix it?