A web server system produces the following measurements:

Each web server request requires an average of 1.2 seconds of CPU time and generates an average of 40 disk accesses to Disk A and 20 disk accesses to Disk B.

On average, an access to either Disk A or Disk B requires 10 msec. - Disk A throughput is measured at 30 disk accesses per second.

The average response time of Disk A is measured to be 25 msec.

Q1.1: What is the utilization of the CPU?

Q1.2: What is the average number of accesses waiting for Disk A?