The Residential Energy Consumption Survey found in 2001 that 47% of American households had internet access. A market survey organization repeated this study in a certain town with 25,000 households, using a simple random sample of 500 households: 239 of the sample households had internet access.

The percentage of households in the town with internet access is estimated as ____; this estimate is likely to be off by ____ or so.

If possible, find a 95%-confidence interval for the percentage of all 25,000 households with internet access. Give the amount of the confidence interval or write "not possible"