Could you please tell me if the use of devoted is correct and natural in these sentences? If is it INCORRECT, could you please provide me with a suitable word?

1) The teacher's speech was mainly devoted to political issues.

2) The meeting was largely devoted to the recent staff turn-over.

3) There are six drivers in the company--but two are fully devoted?? to the CEO. (I don't mean sincere here. I mean at his disposal. Any substitue?)

4) One room in his small apartment is fully devoted? to a library.

I hope I am able to get the message across.

Thanks for your time and effort,

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Comments  (Page 2) 
It can, but I think it works better with guards. Probably just my personal preference. You can use either word for either, I guess.