A system has four processes, P1 through P4, and three types of resources, R-1 (3 units), R2 (2 units), and R3 (2 units). Process P1 holds 'I unit of IR1 and requests 1 unit of R2. Process P2 holds 2 units of R2 and requests 1 unit of R1 and 1 unit of R3. P3 holds 1 unit of R1 and requests 1 unit of R2. P4 holds 2 units of R3 and requests 1 unit of Rl. A. Draw the resource allocation graph for this system B. Is there a danger of deadlock? If yes, what is the deadlock process? If no what is the safe queues?.