Here is a sentence; I gave a bone to Pete and to Max yesterday. The reason why [and to Max] is a constituent. The reason why [Pete and] is not a...

Here is a sentence; I gave a bone to Pete and to Max yesterday.

1. The reason why [and to Max] is a constituent.

2. The reason why [Pete and] is not a constituent.

I need to answer the questions by using more than one constituency test.

ps. I found lots of reasons why [and to Max] is NOT a constituent but my professor insisted that it forms a constituent even though its grammatical category is not defined.