Answer
26.58 billion dollars
Work Step by Step
The flow of rate of the investment stream can be expressed as: $R(t)=(0.03)(148.98)=4.47$ billion dollars per year.
We have: $r=0.048$ and $T=7 \ years$
The future value is equal to: $\int_0^{7} 4.47 e^{0.048(7-t)} \ dt =37.19$ billion dollars
Therefore, the present value is equal to:$\dfrac{\ Future Value}{e^{rT}}=\dfrac{37.19}{e^{0.048(7)}}=26.58$ billion dollars