Answer:
{ } and {1}
Step-by-step explanation:
Let as consider the given set
![S=\{1\}](https://tex.z-dn.net/?f=S%3D%5C%7B1%5C%7D)
We need to find tall subsets of the given set.
Number of subsets of a set = ![2^n](https://tex.z-dn.net/?f=2%5En)
where, n is the number of elements in that set.
In the given set the number of elements = 1.
Number of subsets of given set = ![2^1=2](https://tex.z-dn.net/?f=2%5E1%3D2)
So, the number of subsets of given set is 2.
If all elements of set A are included in set B, then A is subset of set B.
![A\subseteq B](https://tex.z-dn.net/?f=A%5Csubseteq%20B)
Empty set or ∅ is the subset of all sets and each set is the subset of itself. It means
![\{ \}\subseteq \{1\}](https://tex.z-dn.net/?f=%5C%7B%20%5C%7D%5Csubseteq%20%5C%7B1%5C%7D)
![\{ 1\}\subseteq \{1\}](https://tex.z-dn.net/?f=%5C%7B%201%5C%7D%5Csubseteq%20%5C%7B1%5C%7D)
Therefore, subsets of given set are { } and {1}.