Consumers spent an average of $15.30 on a meal at a restaurant in 2014. (Data extracted from

Question:

Consumers spent an average of $15.30 on a meal at a restaurant in 2014. (Data extracted from bit.ly/1KVWWxT) Assume that the amount spent on a restaurant meal is normally distributed and that the standard deviation is $2.
a. What is the probability that a randomly selected person spent more than $16?
b. What is the probability that a randomly selected person spent between $10 and $12?
c. Between what two values will the middle ninety-five percent of the amounts spent fall?