Final answer:
The stock price under the enterprise valuation approach should be $26.50.
Step-by-step explanation:
To calculate the stock price under the enterprise valuation approach, we need to subtract the debt from the enterprise value and divide it by the number of shares outstanding.
Enterprise Value = PV of FCFF
Given that the enterprise value is $100 billion and the debt is $47 billion, the equity value is $100 billion - $47 billion = $53 billion.
Next, divide the equity value by the number of shares outstanding (2 billion).
Stock Price = Equity Value / Shares Outstanding
Stock Price = $53 billion / 2 billion = $26.50
Therefore, the stock price should be $26.50 (option a).