3. (16 pts) which of the following memories are possib apply and explain your answer? (P: Possible, IM: Impossible, R: Reasonable, UR: Unreasonable) le? Which are reasonab le? Circle all that a) 8-bit address, 256 cells, 8-bit cell size PIMRUR b) 12-bit address, 4096 cells, 12-bit cell size P IMR UR c) 10-bit address, 512 cells, 10-bit cell size IMRUR d) 9-bit address, 1024 cells, 32-bit cell size IMRUR 4. (14 pts) Exp la in briefly with the aid of diagrams the organization of level 2 (uses Hamming code) and 3 (uses single parity bit code)? What is the advantage and disadvanta ge of RAID level 3 compared to RAID level 2