i will upvote

show work please

You have made an investment which promises to return $200 in 1 year and $100 in 2 years. What is the Macaulay duration of this investment given the annual effective rate of interest rate is 6%? A) 1.25 years C) 1.41 years E) 1.65 years B) 1.32 years D) 1.52 years