Write a script to back up multiple files into a directory, create the directory if thedirectory doesn't exist, and display the message indicating the number of files hasbeen successfully backed up$.$ The last argument to the script is the directory.$ lsfoo$1$ foo$2$ foo$3$ foo$4$ foo$5$ foo$6$$ ex$5*$ progsThe directory progs is created$\mathrm{.}6$ files have been backed up into the directory progs.$ lsfoo$1$ foo$2$ foo$3$ foo$4$ foo$5$ foo$6$ progs$ ls progsfoo$1$ foo$2$ foo$3$ foo$4$ foo$5$ foo$6$ Bash programming