Soda bottles are filled to 2.0 liters with a standard deviation of 0.05 liters and are normally distributed. If you select a random sample of 25 bottles what is the probability that the sample mean will be:

a. Between 1.99 and 2.0 liters

.

b The probability is 99% that the sample mean will contain at least how much soft drink?

c. The probability is 99% that the sample mean will contain an amount that is between which two values (symmetrically distributed around the mean)?

For the first one I got the ans 0.0793

The last two I didn't understand, the questions.