Opreating system , please I need them all to be solved. Thank you

For the three systems described in I - III below, given that all of the devices are of the same type consider applying Banker's Algorithm to answer these questions: Determine the remaining needs for each job in each system Determine whether each system in safe or unsafe. If the system is in a sate state, list the sequence of requests and release that will make it possible for all possible for all processes to run to completion. If the system in in an unsafe state, show how it's possible for deadlock to occur