I'd use "of" in #1, #3 and #4 (though #1 could probably use a better word). The second sentence must use "to" because the meaning of "capable" there is simply able, efficient or skilled. The meaning of "capable" in all the others is "have the capacity to do something" and "capable" there can't be viewed in isolation .
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IvanhrThus, the choice between using "of" and "to" seems to depend on whether you can treat "capable" as a synonym for skilled/able etc, in which case the preposition to is possible, or the whole phrase "capable of something/doing something" should be considered, which would then require you to use "of".I see ...at last