In a recent study on world happiness, participants were asked to evaluate their current lives on a scale from 0 to 10, where 0 represents the worst possible life and 10 represents the best possible life. The responses were normally distributed, with a mean of

4.5 and a standard deviation of 2.3. Answer parts (a)-D

below.

(a) Find the probability that a randomly selected study participant's response was less than 4.

The probability that a randomly selected study participant's response was less than 4 is _______

(Round to four decimal places as needed.)