4.8 Give all possible final values of variable x in the following program. Explain how you got your answer int x = 0, sem s1-1, a2-0, co P(s2); P(s1); x = x*2; v(s1); // Pls1); x = x#x; V(BI); // Pfs1); x = x+3; V(e2); V(s1); oC