Given the template code, $$copyConvert$.$c$,$ fill up the marked portion so that your program is performing the following tasks:

$$ Read from input file from the string pointed by argv$[1].$

$$ Replace every occurrence of a lower$-$case char with that of an upper$-$case char.

$$ Write the converted file contents into another file pointed by argv$[2].$

$$ You are allowed to use only the system calls covered in the class $($e$.$g$.,$ read$(),$ write$(),$ open$(),$ close$()).$ You can$$t use library calls such as fread$(),$ fopen$(),$ fwrite$(),$ etc. If you don$$t follow this requirement, you will get significant penalty!!

You can compile this program as was discussed in the class:

$$>$ gcc $$o copyConvert copyConvert.c

After the compilation you need to run your program with two file names as command$-$line arguments such as:

$$>./$copyConvert file$1.$txt file$2.$txt

Then your program is supposed to create another file $$file$2.$txt$$ from the existing file $$file$1.$txt$$ after replacing each occurrence of a lower$-$case character with an upper$-$case character.

For example, if your input file, file$1.$txt$,$ contains:

GAILY bedight,

A gallant knight,

Then, the output file, file$2.$txt$,$ should contain:

GAILY BEDIGHT,

A GALLANT KNIGHT,