Suppose That the Production Function for the Economy Is Y

Suppose that the production function for the economy is Y = AK⁰.⁵ᴸ⁰.⁵.If the capital stock ?= 40 000,the quantity of labour = 10 000,and the efficiency index = 3,the equilibrium real wage is

A) $3.
B) $4.50.
C) $9.
D) $16.67.