You have $5,620, you decided to invest it in an investment plan that will pay you 21% interest for the next 3 years, after which you want to invest your money for the next 15 years in a safer investment plan that pays only 3.5%. How much will you have at the end of the 18 years? Select one: a. $ 8,512.20 b.$ 1,858.82 c.$ 16,680.06 $ d. $ 108,727.10