urgent help please

2) A resource R has 20 instances. There are 2 processes Pl and P2. PI's max demand is 12 and P2's max demand is 14 (instances). From deadlock avoidance perspective, how many allocations are safe? For example, allocation (0,0) is safe. Allocation (1, 2), which indicates that Pl is allocated I instance and P2 is allocated 2 instances at the moment, is also safe state. But (12, 14) may not be safe. Check it