Chametz in the office

I work in a secular office. On Pesach I don’t come in to work, but the office continues to operate as usual, and there is chametz there.
1. Do I have any halachic obligation to do something about the chametz that is in the office before Pesach – for example, to try to prevent the employees from using it, or to throw out the office chametz before Pesach?
2. I am responsible for the office shopping, and the employees ask me to buy chametz that will remain there during the Pesach holiday as well. Am I allowed to buy such chametz for them, and if not – what should I do?
It should be noted that there are about 7 employees in the office, of whom 2 are non‑Jews.

Shalom u’vracha.

1. The chametz in the office is not your responsibility.

2. It is forbidden to buy chametz for them that they will have for the holiday.

Tell them that you are not allowed to buy chametz for them for the holiday. Offer to buy them cookies that are kosher for Pesach instead.

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