Could you please provide accurate answers to the following questions

In a concurrent system we reach a deadlock state when... Select one: O a. All the concurrent processes of the system are waiting for unavailable resources and they cannot progress their state at all b. One concurrent process of the system have a bug that "kills" this process and consequently affect the overall life of the system OCAll the concurrent processes of the system have a bug that "kills" them and consequently ends the life of the system O d. One concurrent process of the system is alternating an idle state with a processing state where it attempts to access shared resources that are never available, whereas other concurrent processes may still be progressing their state In a concurrent system, a process can reach a starvation state if... Select one: a. It accesses the necessary shared resources too slowly and, although it is not stuck, its processing time is too slow. O b. The process is stuck waiting for a shared resource forever and it cannot make any progress c. Even when not accessing shared resources, the process is slower than other concurrent processes and it does not progress its state as fast as the other processes O d. It attempts to access a shared resource necessary to progress its state several times and, although the process is not stuck, it always fail to access the necessary shared resource o e. It requires too much memory and this characteristic contributes to slow down the process until it starves In a concurrent system, if we ensure that a deadlock state is never reached (deadlock-free)... Select one: O a. We can still have a process that is stuck waiting for an unavailable shared resource without making any progress ob. We can still risk to reach a starvation state O c. The system is also ensuring a fair access to the shared resources among the concurrent processes d. The system will be guaranteed to function normally without any other issues