Question: 1 . Show that every infinite decidable language has an undecidable subset. 2 . Do a constructive proof of the previous problem. That is ,

1. Show that every infinite decidable language has an undecidable subset.
2. Do a constructive proof of the previous problem. That is, give a mechanical way to build an undecidable
subset of a given undecidable language.
3. Show that every infinite decidable language has infinitely many undecidable subsets.

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