Greg is thinking about an investment opportunity, since he is currently earning only 6.5% on his $10,000 savings at the bank. Here are some details he is looking over:

Current date: Dec 28^th, 2020

Required investment: $5,000 on Jan 1^st, 2021 and $5,000 on Jan 1^st, 2022

Expected returns: $2,000 on Dec 31^st, 2022; $4,500 each on Dec 31^st , 2023 and Dec 31^st, 2024.

Riskiness: medium

Greg is thinking about saving for a down payment for a house. He estimates he will need $50,000 so perhaps this investment will help him achieve his goal a little faster. He expects to save $10,000 this year, and $15,000 each year after that. Advise Greg on this investment opportunity, including supporting calculations and arguments.