A standardized exam's scores are normally distributed. In a recent year, the mean test score was $20\mathrm{.}7$ and the standard deviation was $5\mathrm{.}6.$ The test scores of four students selected at random are $14,21,8,$ and $36.$ Find the $z-$scores that correspond to each value and determine whether any of the values are unusual.

The $z-$score for $14$ is

$($Round to two decimal places as needed.$)$

The z$-$score for $21$ is

$($Round to two decimal places as needed.$)$

The $z-$score for $8$ is

$($Round to two decimal places as needed.$)$

The $z-$score for $36$ is

$($Round to two decimal places as needed.$)$

Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice.