2. Croatia is a small country in Eastern Europe. a. Suppose that in Croatia each successive increase in the amount of physical capital per worker leads to the same increase in productivity. Use a correctly labeled graph to show what Croatia's productivity curve would look like. b. Suppose instead that each successive increase in the amount of physical capital per worker leads to a larger increase in productivity. Use a correctly labeled graph to show what Croatia's productivity curve would look like. 0. Between 1991 and 1995, Croatia fought a war for independence from Yugoslavia. This war destroyed a significant portion of the physical capital in Croatia. Supposing all other things remained unchanged, explain how the effect of this change would be illus- trated on your graph from part a. d. After the war, Croatia invested in education that increased each worker's ability to make productive use of any given amount of capital. Explain how this affected Croatia's productivity curve