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...

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 mean response was

with a standard deviation of

​(a) What response represents the

​percentile?

​(b) What response represents the

​percentile?

​(c) What response represents the

​quartile?