Problem
Given the sets A = {1,2,3,4,5} and B = {1,3,5}. Determine if set B is a subset of set A.
Solution
Step 1 ：A subset is a set which contains all elements of another set. A set B is a subset of a set A if every element of B is also an element of A.
Step 2 ：We compare each element in set B with those in set A.
Step 3 ：Element 1 of set B is found in set A.
Step 4 ：Element 3 of set B is found in set A.
Step 5 ：Element 5 of set B is found in set A.
