Use the ls command to (a) List all files in the /usr/bin directory that end with the extension .sh. Note that this should list gvmap.sh but not ssh. (b) List all files in /usr/include that start with a or b and end with .h. (c) List all files in /usr/bin whose names start with a and are 6 characters long. Use script a1q3.log to record the commands you use to answer these questions and their outputs in a file a1q3.log. Put a1q3.log under Subversion control.