I know the answer to the following problem, but would like an explanation on how to get it (with a financial calculator):

• You have invested your money into a project that will pay you $1,000 starting 5 years from today (t = 5) and will continue to pay out until 20 years from today (t = 20). If the interest rate is 7% p.a., then the value of your investment today () is $______.
• 7,206.80
• 6,948.38
• 6,735.33
• 9,107.91
• 9,446.65