Q$13[5$pts$]$ The following code fragments represent two processes $($process A$,$ and process B$)$ working in

strict alternation where the initial value of turn is $0.$ The given code fragments do not provide a good

mutual exclusion for the two processes. Use the space next to the code to answer the following questions.

$($a$)[3$pts$]$ Explain why they do not provide a good mutual exclusion by giving a scenario that supports

your answer $($i$.$e$.,$ you should say something like this: "process A is scheduled, and it executes its

first instruction, then it enters its critical region, a context switch occurs $..."$ and so on$).$ Assume

that turn is initially $0.$

$($b$)[2$pts$]$ Propose a solution to solve that problem. You may alter the code provided below.