Consider a computer with 1024 Mbytes of available memory (not used by the OS), a disk, a terminal, and a printer. Three programs, JOB1, JOB2, and JOB3, are submitted for execution at the same time, with the attributes listed in the following Table:

	JOB1	JOB2	JOB3
Type of job	Moderate compute (65% CPU utilization)	Heavy I/O (15% CPU utilization)	Heavy I/O (10% CPU utilization)
Duration	6 min	30 min	48 min
Memory required	256 M	512 M	128 M
Need disk?	No	Yes	No
Need terminal?	No	No	Yes
Need printer?	No	Yes	No

1. Draw the utilization histogram (uniprogramming and multiprogramming) for each of the following:

• CPU
• Memory
• Disk
• Terminal
• Printer
• Job History

2. Complete the following Table to show the Effects of Multiprogramming on Resource Utilization:

	Uniprogramming	Multiprogramming
Processor use
Memory use
Disk use
Printer use
Elapsed time
Throughput
Mean response time

Consider the following lists for the uptime(s) and downtime(s) for a particular system over a 24 hr period:

uptime (hours): {5.25, 3.45, 12.67, 2.58}

downtime (hours): {0.02, 0.005, 0.01, 0.015}

Calculate the Mean Time to Failure (MTTF), the Mean Time to Repair (MTTR) and the system Availability. Round your answer(s) to the nearest tenth.