Write a shell script that ...

1) Prints "File" or "Diectory" based on the type of it's argument

2) Accepts multiple filenames as arguments and prints only those 
that exist and are readable.

3) Finds and deletes all empty files in a given directory.

4) Tracks how many times it has been executed by updating a counter in a file. 

5) converts all filenames in a directory to lowercase.
Hint:  tr