Soso Electric Power agreed to clean up 6 coal-fired power plants that are believed to be contributing to acid rain in the north-eastern Meeleisa.Nitrogen oxide emissions are to be reduced by 69% by 2022 and sulfur dioxide emissions by 79% by 2030. Assume Plan A is to spend RM0.577 billion per year in year 1 through 4 and same amount of RM0.577 billion per year in year 7 through 10. Plan B is to spend RM0.52 billiorn each year in years 1 through 10. At an interest rate of 8% per year, which plan is more economical to the company based on a present worth analysis? (Units are RM billion) PW Plan A. PW Plan B Select Plan Format: -6.695 Format: -4.728 Format: A