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 rental price of capital is

A) $0.33.
B) $0.75.
C) $1.00.
D) $2.22.