Write a script called $$network$-$test.sh$$ that takes input a file $$network$-$test$-$machinelist.txt$$ with a list of DNS names $($e$.$g$.$ google.com, iit.edu, anl.gov$),$ each name on a

separate line, and runs the ping utility collecting $3$ samples from each DNS name, and

writing the RTT $($round trip time$)$ average latency into a file $$network$-$test$-$latency.txt$$

where each line will have the DNS name and average RTT separated by a space. Make

sure it works with at least $10$ DNS names, but it should work for an unspecified number

of DNS names