Question $7(10$ points$)$

What would be the value of the variable c after the executing the following code on a $16-$bit CPU?

unsigned int $\backslash ($ a$=1,$ b$=3,$ c $\backslash )$;

$\backslash (\backslash$mathrm$\{$c$\}=\backslash$mathrm$\{$a$\}\backslash )-$ b;

Question $8(10$ points$)$

The system clock is configured to be $16$ MHz $.$ What is the duration of a single clock tick in the timer module if the prescale factor is set to $4.$

Question $9(10$ points$)$

In programming some MCU applications, some variables need to be declared with a volatile modifier, for example: volatile unsigned int iFlag. What is the objective of such a variable declaration? Provide a practical example of a case when it should be used, and what might happen, if not.