6.2: The winner of a lottery is awarded $9,000,000 to
be paid in annual installments of $450,000 for 20 years.
Alternatively, the winner can accept a "cash value" one-time
payment of $4,050,000. The winner estimates he can
earn 8% annually on the winnings. What is the present
value of the installment plan? (Round your answer to two decimal
places.)