In three years, you want to travel to europe which you expect to cost $10,000 at that time. you have deposited $5,000 in a certificate of deposit that pays 6% interest annually and will mature in three years. you also have a rich aunt who will give you an investment which pays 10% annual returns that will make up the balance of the $10,000 not paid for by the cd. how much must you aunt invest today?