In early $2018,$ Ford Molor $($F$)$ had a book value of equity of $534\mathrm{.}6$ billion, $$3\mathrm{.}2$ billion shares oditanding, and a maked price of $$12\mathrm{.}63$ per share. Ford also had cauh of $$38\mathrm{.}4$ billion, and total debt of dett of $$138.4$ tilion. Over tis period, what was the charge in Fords

a$.$ market capitalization?

b$.$ markel$-$Ho$-$bock ratio?

c$.$ enterprise value?

a$.$ Over the $4$ year period, what was the change in Ford's market capitalization?

The change in Forff market capitalization was : $$ billion. $($Riound to two decimal places.$)$