In early 2015, Ford Motor (F) had a book value of equity of $ 24.8 billion, 4.0 billion shares outstanding, and a market price of $ 16.00 per share. Ford also had cash of $ 21.7 billion, and total debt of $ 119.2 billion. Three years later, in early 2018, Ford had a book value of equity of $ 35.0 billion, 10.0 billion shares outstanding with a market price of $ 11.00 per share, cash of $ 26.5 billion, and total debt of $ 154.3 billion. Over this period, what was the change in Ford's a. market capitalization? b. market-to-book ratio? c. enterprise value?