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(5) (6 points) Please illustrate the main advantage of dual-mode operation (i.e., why should the system distinguish between user mode and kernel mode) ( 2

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(5) (6 points) Please illustrate the main advantage of dual-mode operation (i.e., why should the system distinguish between user mode and kernel mode) ( 2 points) and describe the workflow of dual-mode operation after a user application requests a service via a system call (4 points)

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