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Issue description: RH442 ch07s02: step 6.2 & 6.3 is not explained enough to get what is happening. Why was 6th task not allowed to execute ? which is the sixth task / pid ? 6395 ? How was 5th task allowed then ? This step needs more explanation to understand wha are we observing and why it is happening like this ? Is it correct that : In the example that you provided, the deadline scheduler is configured to allow a total utilization of 30%. However, the actual utilization of the deadline tasks is 174.10256530%. This means that the deadline scheduler is overloaded but then how 5th task was allowed. Also the scripts used to calculate is a nightmare to look or understand. we expect a lot of explanation in step 6.3 like for each pid how current and configured util has so varied high ranges but suddenly it ends at lab finish command. 

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