(Linux)

Provide the command necessary to solve the following problems. The command string provided should be in its simplest possible form (don't use two commands where one will accomplish the task). Complete the following questions using the file /opt/ci132/data/filter_examples/name_ssn as input Sample record: Teresa Groves:606-38-1182

a. Display only names from the file

b. Display only last names from the file, sorted by last name

c. Redact all social security numbers. Display the contents of the file with all numbers in the output changed to the letter X

d. Remove the dash delimiter from the social security numbers. Display the file with all dashes (-) removed.