1 English professor Jacob Bright has one typist, who types for 8 hours per day. He submits three types of jobs to the typist: tests, research papers, and class handouts. The information in Table 10 is available. Professor Bright has told the typist that tests have priority over research papers, and research papers have priority over class handouts.

Assuming a nonpreemptive system, determine the expected time that Professor Bright will have to wait before each type of job is completed.

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TABLE 10 Type of Job Frequency (number per day) E(S) E(S) (hours) (hours) Test 2 1 2 Research paper Class handout 0.5 4 20 5 0.5 0.50