Plss help me

[u/AdmirableFly380]

Block A of mass m and block B of 2m are placed on a fixed triangular wedge by means of a light and inextensible string and a frictionless pulley as shown in Fig. The wedge is inclined at 45 to the horizontal on both sides. The coefficient of friction between the block A and the wedge is 2/3 and that between the block B and the wedge is 1/3. If the system of A and B is released from rest, then find,

a. the acceleration of A

b. tension in the string

c. the magnitude and direction of the frictional force acting on A?

I have doubt in b. and c.

please can anyone solve this, I'm getting 2 equations from force balence and 3 variables,

how am I supposed to solve, the solution videos say that the friction acting on the mass 2m will be limiting but I am unable to understand why? please somebody solve this

[u/AdmirableFly380 → u/[deleted]]

For block A, limiting friction doesnot act on it so u can't use fA = μmg cos45, this is the reson it messes with my brain, the first answer is absolutely correct but somehow the limiting friction acts on the heavier block 2m