Write a script called 'prob3.m' that does the same thing as the previous question except that it makes use of a switch-case construct instead of an if-else.
In the file 'hw4.m' first issue a command that lists all the variables currently in the workspace. Then execute execute 'prob3.m'. Finally, to see if your script did what it was supposed to, redisplay a list of all the variables in the workspace.