A process p needs to use resources r$1$ and r$2$ together or r$2$ and r$3$ together.

$11-$ Under approach $1,$ r$2$ will be requested $\_\_\_\_\_\_\_\_\_.$

a$)$ once

b$)$ twice

$12-$ Under approach $2,$ r$2$ will be requested $\_\_\_\_\_\_\_\_\_$

a$)$ once

b$)$ twice

$13-$ Under approach $3,$ if r$3$ is available, r$2$ will be requested $\_\_\_\_\_\_\_\_\_$

a$)$ once

b$)$ twice

I get the feeling it's A$,$B$,$A but I don't know how to explain it$.$ I guess if I had a reason to doubt, it would be #$12.$ If a process is sharing a resource will it be requested once or twice? I think it'll be called twice so I answered B$,$ is my assumption correct?