A company has expected FCF next year of $13$ million. FCF will grow for $3$ years at $10\%($years $2,3,$ and $4),$ for the following $2$ years at $7\%($years $5$ and $6),$ and after that $($starting in year $7)$ it will reach a forever growth rate of $3\mathrm{.}5\%.$ Calculate enterprise and equity value if $($a$)$ the company has $$50$ million in debt, $$10$ million in cash and a cost of capital of $13\%.$ And $($b$)$ the company has $$75$ million in debt, $$10$ million in cash and a cost of capital of $11\mathrm{.}5\%.$