Consider a concurrent program with two processes, P and Q, defined as follows. A, B, C, D, and E are arbitrary atomic statements. Assume that the main program (not shown) does a parbegin of two processes. (20 points)
void P( ) void Q()
{ {
A; D;
B; E;
C; }
}
Show all the possible interleaving of the execution of the preceding two processes.