exercise5/answer.py: set operators |, &, - — do the module 05 TODOs require method forms too?

[dab00gieman]

From answers/exercise5/answer.py:

m = {1, 2, 3}
n = {3, 4, 5}
print(m | n)
print(m & n)
print(m - n)

The file demonstrates the operator forms (union, intersection, difference via symbols) and also shows dedup (fruits contains "apple" twice; denim contains 4 twice) and sorted() on a set. Do the Module 05 TODOs also expect the named-method forms (m.union(n) etc.), or are operators the required idiom for the answers?