4. Consider the following snapshot of a system: Allocation Max Available ABCD ABCD ABCD TO 1000 1750 1520 T1 1354 2 356 T 0012 0012 TZ 0014 0656 TA 06 32 0652 Answer the following questions using the banker's algorithm: a) What is the content of the matrix Need? b) Is the system in a safe state? c) If a request from thread Ti arrives for (0,4,2,0), can the request be granted immediately? d) If a request from thread T4 arrives for (0,0,2,0), can the request be granted immediately