Please show work so I can see whats going on-

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 5.9 and a standard deviation of 2.4.

Answer parts (a)-(d) below.

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

(b) Find the probability that a participant's response was between 4 and 6.

(C) Find the probability that a randomly selected study participant's response was more than 8.

(d) Identify any unusual events. Explain your reasoning.