If company A has production function f(k)=3k^1/3; company B has f(k)=6k^1/2; suppose new machines can make depreciation rate half of the former one and depreciation rate two times of the former one (; ) , find the new steady-state condition of company B, and show the shift on the graph. If company A only takes total consumption as a priority, should it use the new machines? Show the math evidence.

8 = 2 S s' = 2 2s 8 = 2 S s' = 2 2s