Everything on the picture! Please give me a explanation on the side how you did the project. Thanks

Develop a program in C that spawns, using the fork ) system call, at least two child processes. The program must read from at least one file and/or the keyboard, however the program must output the results to files. Each process should do a different type of computation that takes some amount of time running in the background. For example, you can run the recursive fibonacci algorithm as one of the processes and the other could be a sequential search, or some sorting algorithm, or the sum of three numbers from a file, or the towers of Hanoi algorithm, or any other algorithm that takes some amount of time (as a recommendation, use any polynomial or exponential algorithm). You have access to large files of numbers, or to make these files larger use a cat command. We will build on these programs (maintenance) to enhance them using more Required: 1. Source code 2. Complete written description of the program stating input requirements system calls and, as a final, present them in class. and description of output (files). 3. Test runs and analysis of runs