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Can someone please help me solve these dynamic mcq's with weird pulleys?

For question 22 I did 5g-12g(0.3)=14a

for 23

I don't know how to determine in which direction the friction will be acting

And what are the forces acting on A ? There's its weight, and tension, and friction, but which coefficient of friction is do I use here ? and in which direction is it working ?

Update:

A link to a much clearer picture: 

https://imgur.com/a/ccVqpDk

P.s, is my working in 22 correct ?

Attachment image
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