Q$\mathrm{.}1.(30$ points$)$ Given the following directory structure. Write a shell script that takes file names as command line arguments.a$.$ Write the last $5$ lines of labwork$1.$ txt into a file named lines.b$.$ Your current diractory is CSE$232$fall. Change your current directory as CSE$232$spring.c$.$ Copy all labworks under CSE$232$ fall directory to CSE$232$spring directory with a single command.d$.$ Change your current directory as Downloads. Then change the permissions of dl$.$pdf as: give read, write and execute rights to the user; remove execute right from the group and do not change other rights of the group; remove write and execute rights from others and do not change other rights of others.