a. A common explanation for China's growth is that it is "investment-led growth." A key piece of evidence is that the investment rate in China has increased by about 30% of GDP in the early 1990s to about 50% of GDP now. What is investment led growth, and what might you expect to happen to China's growth if China's growth is in fact investment led growth. Is the20% increase in China's investment rate evidence that China's growth has been investment led growth