In early 2015, Ford Motor (F) had a book value of equity of $24.5 billion, 4.1 billion shares outstanding, and a market price of $16.06 per share. Ford also had cash of $21.3 billion, and total debt of $118.2 billion. Three years later, in early 2018 , Ford had a book value of equity of $35.9 billion, 10.3 billion shares outstanding with a market price of $10.62 per share, cash of $26.9 billion, and total debt of $159.3 billion. Over this period, what was the change in Ford's a. market capitalization? b. market-to-book ratio? c. enterprise value