wk8 Op Sys Discs

"Shell Variable Expansion Before Pathname Expansion"  Please respond to the following:

• As explained in the text, variable expansion occurs before pathname expansion. Write a sequence of commands or a script that demonstrates at least four (4) examples of such <a standard> . Provide the commands or script along with a screenshot of the output. Then, describe your work and explain how the shell expands your variables. 
• Explain the key ways you would use shell variable expansion and pathname expansion to your advantage when writing your shell scripts.