Hello Can you please help with computer architecture

1. When is data striping across different disks most and least effective? Explain.
2. Compare between RAID level 0, 1, 2, 3, 4 and 5 with respect to read & write performance?
3. What is the main advantage of directory-based cache protocol compared to snooping protocol?
4. Explain why cache coherency is important for Shared Memory Processors design?
5. In the snooping coherence protocol, what is the principal purpose of the Exclusive state?