In early 2015, Ford Motor (F) had a book value of equity of $25

In early 2015, Ford Motor (F) had a book value of equity of $25.3 billion, 4.1 billion shares outstanding, and a market price of $16.41 per share. Ford also had cash of $22.1 billion, and total debt of $120.2 billion. Three years later, in early 2018, Ford had a book value of equity of $35.3 billion, 10.8 billion shares outstanding with a market price of $11.43 per share, cash of $26.9 billion, and total debt of $156.1 billion. Over this period, what was the change in Ford's a. market capitalization? b. market-to-book ratio? c. enterprise value? 
a. Over the 3-year period, what was the change in The change in Ford's market capitalization was $ b. Over the 3-year period, what was the change in The change in Ford's market-to-book ratio was 
Ford's market capitalization? billion. (Round to two decimal places.) Ford's market-to-book ratio? . (Round to two decimal places.) 
c. Over the 3-year period, what was the change in Ford's enterprise value? 
The change in Ford's enterprise value was $ 
billion. (Round to two decimal places.)