Mia is thinking about moving her traditional IRA to a Roth IRA. Making this change will lead to a loss of 15% of her retirement savings. She has $600,000 saved and needs to withdraw $3,500 per month after taxes. She expects her tax rate to be an average of 20% in retirement. This money is and will remain invested at a rate of 6%. How long with her money last under each type of IRA