(a)Write down the RAID levels of the following schemes. (I) Mirrored disks, (ii) non-redundant striping, (iii) bit-interleaved parity, and (iv) block-interleaved distributed parity. (4%)

(d) Consider a system consisting of 11 resources of the same type, being shared by n processes. Each process may need at most 3 of these resources at the same time. What is the maximum value of n that keeps the system deadlock free? Explain your answer to receive full credit. (7%)