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Consider the basic Solow growth model with the following aggregate Cobb-Douglas production function: Y=AK" L/*#, where a is a parameter and satisfies 00 is exogenous and measures productivity. A can potentially change over time, and if it does, it changes permanently. Denote the saving rate by s, 0An. Using your answers to part (b) explain how this change will affect the steady state level of capital per worker and output per worker. Also, illustrate these effects using the graphical analysis. (15 points)