A proposed nuclear power plant will cost $3.2 billion to build and then will produce cash flows of $400 million a year for 15 years. After that period (in year 15), it must be decommissioned at a cost of $1,000 million. Note: Negative amounts should be indicated by a minus sign. Do not round intermediate calculations. Enter your answers in billions rounded to 3 decimal places. a. What is the NPV of the project if the discount rate is 4% ? Answer is complete but not entirely correct. Net present value b. What is the NPV of the project if the discount rate is 15% ? Answer is complete but not entirely correct