The monthly utility bills in a city are normally distributed, with a mean of

$100

and a standard deviation of

$15.

Find the probability that a randomly selected utility bill is (a) less than

$69,

(b) between

$84

and

$110,

and (c) more than

$140.

The probability that a randomly selected utility bill is less than $69 is_

The probability that a randomly selected utility bill is between $84 and $110 is_

The probability that a randomly selected utility bill is more than

$140

is _