问题如下：
6. In response to Question 4, the increase in the sailboat project’s NPV(in millions) is closest to:
选项：
A. 4.50.
B. 6.50.
C. 6.76.
解释：
A is correct.
The entire 10 million will be subject to taxes, resulting in an additional 6.5 million after taxes. As indicated below, when discounted at 13 percent for three years, this has a present value of 4.5048 (rounded to 4.50 million):
折现率的改变对这三年的OCF没有影响吗？谢谢
