Write all the possible proper subsets for the following set.

$\left\{x, y, z\right\}$

Write all the possible proper subsets for the following set.

$\left\{0, 1, 2, 3\right\}$

If $A$ is the set of letters in the word LESS, find all the subsets of set $A$.

If $A$ is the set of letters in the word LESS, find all the proper subsets of set $A$.

The number of elements of each set is given. Find the number of subsets and the number of proper subsets.

$n\left(A\right)=4$

The number of elements of each set is given. Find the number of subsets and the number of proper subsets.

$n\left(B\right)=2$

The number of elements of each set is given. Find the number of subsets and the number of proper subsets.

$n\left(C\right)=5$

The number of elements of each set is given. Find the number of subsets and the number of proper subsets.

$n\left(D\right)=6$

If $U=\left\{x:x \in N, x\le 9\right\}, find A=\left\{x:x is an odd number\right\}$.