Plzzzzzzzz help me with this shell script

a shell program that takes a minimum two and maximum five, file names as command line arguments. The program merges all the lines of the files except the blank lines into an output file and Prints the combined file in two columns. The program also prints the number of blank lines in each file. The program should generate suitable error messages in case any file whose name has been given as command line argument does not exist.

I hope someone can help me with this script ....i know its a very silly doubt but im really in a mess and i nee help

thnx
sandy