A popular soft drink is sold in 2-liter (2,000-milliliter) bottles. Because of variation in the filling process, bottles have a mean of 2,000 milliliters and a standard deviation of 15 milliliters, normally distributed. Complete parts a and b below.

a. If the process fills the bottle by more than 18 milliliters, the overflow will cause a machine malfunction. What is the probability of this occurring?

Round to four decimal places as needed