$(10$ points$)$

$2\mathrm{.}1$ After which lines of the code, the execution switches to another process? Explain why.

$(10$ points$)$

$2\mathrm{.}2$ Why is EDX not saved by pushl before the actual switch happens?

$(10$ points$)$

$2\mathrm{.}3$ After these two lines:

movl $4(\%$esp$),\%$eax

movl $8(\%$esp$),\%$edx

Which process $($Pa or Pb$)$ is represented by $\%$eax, and which is represented by $\%$edx