Japanese "good", consonant clusters etc.

These q's are for a school assignment; I need the answers very soon... :(

1. How do you say "good" in Japanese?
2. Could anyone give me some sxamples of insane consonant clusters?
3. How many langs are endangered?
4. How many langs are expected to die in the next century?

I checked Ethnologue and I don't get good answers for the last two. :((

Thanks,

--Robert

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