Given sets A = 3, 4, 5, 6 and B = 3, 5, 7, 9, 11, find the union and intersection of A and B.

$$A = \{3, 4, 5, 6\}$$ $$B = \{3, 5, 7, 9, 11\}$$

The union includes all unique elements from both sets.

$$A \cup B = \{3, 4, 5, 6, 7, 9, 11\}$$

The intersection includes only the elements common to both sets.

$$A \cap B = \{3, 5\}$$

The union of A and B is:

$$\boxed{A \cup B = \{3, 4, 5, 6, 7, 9, 11\}}$$

The intersection of A and B is:

$$\boxed{A \cap B = \{3, 5\}}$$