Write a shell script application that will
a.Takes (one argument) - a directory name from the user.
b.Print an error / usage message if the number of arguments is more or less than one.
c.Print another message if the argument is not a directory.
d.For the given directory, print the five biggest files and the five files that were most recently modified. save the output to a file called Output
e.Sort the files in the directory by file size and save the file names to two files called Large files , Small Files
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