C in linux

5. Write a script using iftheelif to compare three words entered by the user and compare if any two match.

6. Write a script using the for loop construct that lists the names of the directory files in the working directory by looping through the files in the working directory and using test to determine which files are directory files.

7. Write a script using the while loop construct that generates 100 randomly generated numbers between 0 and 99 and writes them out in a user specified filename.

8.Repeat #7 with until loop.