Please use excel and explain how you solved it step by step thank you The investment of 50 000 $ made today. after 2 years it has started to earn 10 000 $ per year (from the 2nd year) until the 6th...

Please use excel and explain how you solved it step by step thank you The investment of 50 000 $ made today. after 2 years it has started to earn 10 000 $ per year (from the 2nd year) until the 6th year. It earned 15 000 $ in the 7th year and 12 000 $ in the 8th year. What is the return rate of the investment?