Let’s break down the provided code step by step: 1. **Initialize...

Let’s break down the provided code step by step:

1. Initialize the lists:

   a = [1, 2, 3]
   b = [2, 3, 4]
   

   The variables a and b are lists of integers.
   a = [1, 2, 3]
b = [2, 3, 4]

2. Create sets and union operation:

   set1 = {1, 2, 3}
   set2 = {3, 4, 5}
   set3 = set1.union(set2)
   print(set3)
   

   • set1 is defined as {1, 2, 3}, which is a set containing the integers 1, 2, and 3.
   • set2 is defined as {3, 4, 5}, which is a set containing the integers 3, 4, and 5.
   • set3 = set1.union(set2) computes the union of set1 and set2. The union operation combines all unique elements from both sets, resulting in {1, 2, 3, 4, 5}.
   • print(set3) prints: {1, 2, 3, 4, 5}.

3. Create sets from lists and intersection operation:

   c = set(a) & set(b)
   

   • set(a) converts the list a into a set: {1, 2, 3}.
   • set(b) converts the list b into a set: {2, 3, 4}.
   • The & operator computes the intersection of the two sets, which finds the common elements. The result is {2, 3} because those are the elements that appear in both sets.
   • The variable c is assigned the value {2, 3}.

Summary:

1. print(set3) outputs the union of set1 and set2, resulting in {1, 2, 3, 4, 5}.
2. The variable c ends up containing the intersection of a and b as sets, which is {2, 3}.