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7. [20 points] You are trying to decide how much to save for retirement. Assume you plan to save $5,000 per year and will make the first deposit a year from today. You think you can earn 12% per yea on your investments and you plan to retire in 40 years, immediately after your last $5,000 deposit. [5 points] Assume you can afford to save is $10,000 per year. If you want to retire with $1,000,000 in your investment account immediately after your last deposit (in 40 years), how high ofa return do you need to earn on your investments