Consider the Solow model, with production function Y= K^2/3*L^1/3. There are two countries, A and B, which have the same parameters,

except the savings rate. In particular, the savings rate of country A is 2 times higher than that of country B. Demonstrate that at steady state the income per worker of A is four times higher than that of B.

Hint:

Income per worker in steady state is