
Your solution for Q. 2122 seems incorrect. As mentioned in the question, the relation P=mW/Y is valid only when output is below full employment output.
In that case, W=wY/a = 0.625Y will hold always and R=PYW. Solving, PY=C+I for Y=32,000 would give P=0.9375 and new share of nonwage income as 1/3.
Therefore, none of the options given are correct.
