Can you find two executions, one for a Byzantine Consistent Broadcast (BCD) and one for a Byzantine Reliable Broadcast (BRB), with N=4 and f=1 such that both share the same message exchange patterns up to and including echo messages but exactly one correct node delivers a message m in BCB and all correct nodes deliver m for BRB? If so, write both executions. If not, write the first execution and explain why it is not possible to have all correct nodes deliver m in the second.

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