The quality control department of Cool Cola tested the bottle fillers and found them to fill 500mL bottles to a mean of 501.1 mL, with a standard deviation of 0.48mL. The company's standard is set to test results being within two standard deviations of the mean.

1. What is the acceptable fill range.
2. Why would the company want to overfill the bottles?
3. Three bottles were tested for fill volume, which is acceptable? (choices listed below)

a) 501.0ml b)502.1ml c) 500ml