John and Silvia just had a baby. They want to plan for the baby to attend college starting 18 years from now. The estimate for the annual cost of college is $35,989. If they plan on four years of college, how much should they put in the college fund every year for the next 17 years, starting one year from now? The college fund earns 7% interest per year. John and Silvia should invest $3953 every year for the next 17 years. (Round to the nearest dollar)