Step: Check whether the given set is a finite set or an infinite set
We know that,
Finite sets are the sets having a finite/countable number of memebers.
Infinite sets are the sets having an infinite/uncountable number of members.
The set of multiple of 8 = 8,16,24,32,40............
We can see that there are uncountable multiples of 8.
Therefore, given set is an infinite set.
Hence, the set of multiples of 8 is an infinite set.