I am really confused on how to show my work for these problems

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You want to be a millionaire when you retire in 35 years. How much do you have to save each month if you can earn an annual return of 10.7 percent? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) Savings per month How much do you have to save each month if you wait 15 years before you begin your deposits? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) Savings per month How much do you have to save each month if you wait 25 years before you begin your deposits? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) Savings per month