Answer: a. $1,000.0m
Step-by-step explanation:
Even though the company's enterprise value has no growth, the equity investment of the sponsor will rise from $500.0m when purchased to $1,000.0m when the target for the value of the enterprise is sold for $1500.0m.
The debt was $1000m at year 0 while the remaining $500m was for equity. It should be noted that at the fifth year, equity will be $1,000.0m while the debt will be $500m.