Assume that the production function in an economy is given by y= k^1/2 where y and k are the per worker levels of output and capital, respectively. The saving rate is given by s=.2, the rate of depreciation is .1 and the population growth rate is .05 What is the golden rule level of k?

A. 11.11

B. 10

C. 9.83

D. 12.5