HW 7 Q 16) The monthly utility bills in a city are normallydistributed, with a mean of $100 and a standard deviation of $15. Find the probability that a randomly selected utility bill is(a) less than $70, (b) between $87 and $110, and(c) more than $120.

(a) The probability that a randomly selected utility bill is less than $70 is ___

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(Round to four decimal places asneeded.)