(i) What Kinds of Problems Do We Solve with Amdahl's Law? (ii) Let a program have 40 percent of its code enhanced to run 2.3 times faster. What is the overall system speedup S?| a) What are Hybrid RAID systems? b) Which of the RAID systems cannot tolerate a single disk failure and why? c) Which can tolerate more than one simultaneous disk failure and why? List and briefly explain the three common approaches to establishing protected environments for operating systems? Explain the differences between compiler and interpreter, then explain how they are different from debugger and assembler