The Rate Monotonic Policy states that services which share a CPU core should multiplex it based on priority, where highest priority is assigned to the most frequently requested service and lowest priority is assigned to the least frequently requested AND total shared CPU core utilization must preserve some margin (not be fully utilized or overloaded).

Draw a timing diagram for three services S1, S2, and S3 with T1=3, C1=1, T2=5, C2=2, T3=15, C3=3 where all times are in milliseconds. Use RM fixed policyand ignore EDF and LLF. What is the total CPU utilization by the three services?