Write a full script which will receive a list of filenames from the user as parameters, will output an error message if no parameters are provided and otherwise will input a number from the user and iterate through the parameters, comparing each file's size to the input number and output those files whose size >= the input number. For instance, imagine that the parameter list is file1.txt file2.txt file3.txt and these files' sizes are 5000, 2500 and 3500 respectively and the user input 3000, then the script would output file1.txt and file3.txt (their names) but not file2.txt.