In C please!

[Step 1] Pres_P1.c: Create two files namely, destination1.txt and destination2.txt with read, write permissions. [Step 2] Pres_P2.c: Copy the contents of source.txt into destination1.txtand destination2.txt as per the following procedure. 1. Read the first 100 characters from source.txt, and among characters read, replace each char-acter ' 1 ' with character 'L' and all characters are then written in destination1.txt 2. Then the next 50 characters are read from source.txt, and among characters read, replace each character ' 3 ' with character ' E ' and all characters are then written in destination2.txt. 3. The previous steps are repeated until the end of file source.txt. The last read may not have100 or 50 characters. Once you're done with successful creation of executables for the above two steps do the following. Write a C program and call it Parent_Prcs.c. Execute the files as per the following procedure using execv system call. [Step 3] Using fork create a child process, say Child 1 that executes Prcs_P1. This will create two destination files according to Step 1. [Step 4] After Child 1 finishes its execution, use fork to create another child process, say Child 2 and execute Prcs_P2 that accomplishes the procedure described in Step 2. Tote that: source.txt is already provided in the previous lab. Use that for task 4. [Step 1] Pres_P1.c: Create two files namely, destination1.txt and destination2.txt with read, write permissions. [Step 2] Pres_P2.c: Copy the contents of source.txt into destination1.txtand destination2.txt as per the following procedure. 1. Read the first 100 characters from source.txt, and among characters read, replace each char-acter ' 1 ' with character 'L' and all characters are then written in destination1.txt 2. Then the next 50 characters are read from source.txt, and among characters read, replace each character ' 3 ' with character ' E ' and all characters are then written in destination2.txt. 3. The previous steps are repeated until the end of file source.txt. The last read may not have100 or 50 characters. Once you're done with successful creation of executables for the above two steps do the following. Write a C program and call it Parent_Prcs.c. Execute the files as per the following procedure using execv system call. [Step 3] Using fork create a child process, say Child 1 that executes Prcs_P1. This will create two destination files according to Step 1. [Step 4] After Child 1 finishes its execution, use fork to create another child process, say Child 2 and execute Prcs_P2 that accomplishes the procedure described in Step 2. Tote that: source.txt is already provided in the previous lab. Use that for task 4