a$)$ What are the similarities and differences between the Linux commands ps $-$el and top? $\backslash ([4\backslash$mathrm$\{$M$\}]\backslash )$

b$)$ Why is BIOS not stored on the RAM of a computer? $[2$ M$]$

c$)$ Discuss the scenarios where Peterson's solution will not work. $[2$ M$]$

d$)$ Why do the threads belonging to the same process not share a common stack? Explain your answer. $[2$M$]$