1. what is the difference between deadlock prevention and deadlock avoidance? explain in term of advantages and disadvantages.

2. There are two processes [A, B] and three resources [R1, R2, R3]. R2 and R3 are reusable resource and consumable resource respectively with one unit each. currently, A is holding R1 and requesting R2. B is holding R2 and requesting R1 and R3. A is producer of R3.

i) with the information above, draw the process-resource model to illustrate the situation.

ii) explain wether deadlock is occurred.