4. For each scenaro, assume each block of code is executed by different processors (P1 or P2) that are working concurrently without synchronization. Furthermore, each block of code refers to non-shared variables (a or b) and a shared varable (x). Finally, if P1 and P2 execute their respective blocks of code only once, at any speed, determine all of the possible values of the shared varable x (assumex is intialized to 0) A. Scenaro 1 Processor P1 Processor P2 for (a for (b- 1; x=x+1; a =3; a++) b