Let $R=\left\{\left(a, a^{3}\right): a\right.$ is a prime number less than 5$\}$ be a relation.

Solution:

We have,

$R=\left\{\left(a, a^{3}\right): a\right.$ is a prime number less than 5$\}$

Or,

$R=\{(2,8),(3,27)\}$

So, the range of $R$ is $\{8,27\}$.