A proposed nuclear power plant will cost $2.2 billion to bulld and then will produce cash flows of $300 million a year for 15 years, After that period (in year 15 ), it must be decommissioned at a cost of $900 million. Note: Negotive omounts should be indicated by o minus sign. Do not round intermediate colculations. Enter your answers in billions rounded to 3 decimal ploces. . a. What is the NPV of the project if the discount rate is 5% ? b. What is the NPV of the project if the discount rate is 189