Recent data shows a continuous increase in the market share of electric cars (EV) in the US. Various reasons for the increase have been given. Two of these are (i) technological innovation n EV batteries have resulted in increased availability of EV, and (ii) more and more people are concerned about climate change and want to help environment by driving electric cars. (a) Use supply and demand diagrams to show how each of the explanations above could lead to an increase in the quantity of EVs purchased. (b) How could information about what has happened to the price of EVs help to identify which explanation is more dominant