(c) When the following program is executed, the result will be a process tree, which may vary from one run to the other.

(i) Using a diagram, sketch two of the possible process trees than can result if the program were to be executed.

(ii) Very briefly, explain why we could have different possible process trees for the same program. [You can assume process ID's are integer numbers from 5, 6, 7, .... Assume no error during the fork() system call.]