Reconsider the CPU utilization factor example of Section 1.1 . How short could the execution period of Task 1, e₁ , be made to maintain the CPU utilization zone no worse than “ questionable ” (Table 1.3 )?

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TABLE 1.3. CPU Utilization (%) Zones Utilization (%) <26 26-50 51-68 69 Zone Type Typical Application Unnecessarily safe Various Very safe Various Safe Various Theoretical limit Embedded systems Questionable Embedded systems Dangerous Embedded systems 70-82 83-99 100 >100 Critical Overloaded Marginally stressed systems Stressed systems