Write a Bash script which does the following:

a$.$ Creates a text file with $1000$ lines and name the file myfile. The contents of the file should be

integers starting at $1$ and ending at $1000.$

b$.$ Splits the file into $5$ separate files using the head and tail Unix commands.

c$.$ Recombine the file without the $$middle$$ part $($range $401-600)$ of the file. The recombined file,

without the $$middle$$ part, should end up with the same filename as the original full myfile file.