John is 25 years old. He will receive 2 payments of $ 3500 each. The first payment will be an unknown number of years in the future. The second payment will be 7 years after the first payment. At an effective annual rate of interest of 2 %, the present value of the two payments is $ 6408. Determine at what age John will receive the second payment.(Round to the nearest integer.)

John's age at time of second payment = years?