The The X PixMap Format is a means by which images can be represented as text $($see the XPM manual for details$).$ Here, for example, is a drawing by John Tenniel converted into an X PixMap: alice.txt$.$

For this assignment, save alice.txt in your working directory and rename the file to alice.xpm$.$ Write $C$ code that employs the functions open, close, read, and write to modify the image by making the following replacements:

$z$

dots$>z$

dots$$

After making the first modification, write the file as alice$1.$xpm$.$ The remaining modifications should be saved as alice$2.$xpm and alice$3.$xpm$.$

The only included header files in your source code should be:

$\frac{?}{?}$#include

$\frac{?}{?}$#include

No other files should be included. Hence, functions such as fopen and fprintf should not be used. The purpose of this assignment is to become familiar with low$-$level $C$ functions and their interaction with the operating system.