This question is about "The Mixer".
Answer:
The irony is established because Blackie was to help Shy Man steal the house.
Step-by-step explanation:
As was said in the question above, irony is a literary resource that shows a situation totally contrary to what the reader was expecting. This feature is used to surprise the reader and make the story less cliché and predictable, but innovative and stimulating. In the case of "The Mixer", we see an example of irony when Blackie, who was supposed to help Shy Man to steal a house, ends up disturbing and putting the whole plan to waste.