Consider a disk queue with requests for I/O to blocks on cylinders 108, 193, 51, 132, 24, 134, 75, 77. The head is initially at cylinder number 63. The cylinders are
numbered from 0 to 199.
Find out the total head movements using the following algorithms
a) First Come-First Serve (FCFS)
b) Shortest Seek Time First (SSTF)
c) Elevator (SCAN)
d) Circular LOOK (C-LOOK)

Researchers measured the data speeds for a particular smartphone carrier at 50 airports. the highest speed measured was 78.1 mbps. the complete list of 50 data speeds has a mean of x overbarequals16.11 mbps and a standard deviation of sequals18.65 mbps. a. what is the difference between carrier's highest data speed and the mean of all 50 data speeds? b. how many standard deviations is that [the difference found in part (a)]? c. convert the carrier's highest data speed to a z score. d. if we consider data speeds that convert to z scores between minus2 and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant? a. the difference is nothing mbps.