This homework is optional. It will be used to replace the grade of your lowest homework (if you hand it in).
Complete the missing proofs in coq_binary_proofs.v.
Use DrRacket to handin your solution. (Don't use DrRacket to develop it, tho!). Your solution will be checked by running it in coqc (the Coq compiler) and the program subsequence.rkt will be used to check to make sure that your solution has only added lines to the given file (and not removed or changed lines). Run it with
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