You are asked to run the following program segment:

#include #include #include

main(void) { if(fork()!=-1){ printf("Hello A "); if (fork()!=-1) printf(" Hello B "); else if (fork() !=0) printf("Hello C "); else if(fork() !=0) printf("Hello D "); printf("Hello E "); }

}

Assume the standard output is not redirected List Five of the possiable results of this program show the crresponding tree diagram for eaach case Explain your answer for each case.