WRITE THE CODE IN C

In this exercise you are asked to write a program which generates the following process tree (Scheme 1) Scheme 1: A given process tree. The processes that you generate must remain active for some considerable window of time in order for the user to be able to observe the tree. The leaf process executes a call to: sleep(). The internal process awaits of the termination of all its children processes. Every process printsa corresponding message every time it transitions to another phase (for example: start, loop to wait for children termination, allowing its own termination), so that the validation of the correct program operation is feasible. In order to separate the processes, please make sure that every process terminates with a different return code. In this example, one scenario can be: A 2, B-4, C6, D10