The monthly utility bills in a city are normally​ distributed, with a mean of ​$100 and a standard deviation of ​$13. Find the probability that a randomly selected utility bill is​ (a) less than ​$69​, ​(b) between ​$81 and ​$110​, and​ (c) more than ​$130.
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Part 1
​(a) The probability that a randomly selected utility bill is less than ​$69 is
  
0.0086.
​(Round to four decimal places as​ needed.)
Part 2
​(b) The probability that a randomly selected utility bill is between ​$81 and ​$110 is
  
enter your response here.
​(Round to four decimal places as​ needed.)