Write a script that takes a filename as an argument and adds execution permission to the file for the user if the file is a regular file. Make sure that your script checks for error conditions. Use the following pseudocode to develop your script:

#!/bin/bash

if # of arguments is one then if file in $1 exists

then if file in $1 is a regular file

then add execute permission

else print message that this is not a regular file

fi

else print message that the file does not exist

fi

else print the "Usage" message

fi