I want to solve the question 4

Q3: [2] Keeping in mind the various definitions of operating system, consider whether the operating system should include applications such as Web browsers and mail programs. Argue both, it should, or it should not, and support your answers. Q4: [2] How does the distinction between kernel mode and user mode function as a rudimentary form of protection (security) system? Q5: [3] Which network configuration-LAN or WANwould best suit the following environments? Q6: [3] Which of the following instructions should be privileged? Privileged = YES, Non- Privileged = NO