In early , Ford Motor (F) had a book value of equity of $24.5 billion, $3.8 billion shares outstanding, and a market price of $15.69 per share. Ford also had cash of $21.5 billion, and total debt of $119.9 billion. Three years later, in early 2018, Ford had a book value of equity of $34.8 billion, $10.9 billion shares outstanding with a market price of $10.71 per share, cash of $26.7 billion, and total debt of $153.9 billion. Over this period, what was the change in Ford's

a. market capitalization?

b. market-to-book ratio?

c. enterprise value?