Hi Susan,
Welcome to the Community. It would be great to introduce yourself to the members here.
Well the time for preparation depends on individual. But if we have to make an estimate assuming its a focused study and the person already has working knowledge of Analytics, I would say 7 days of effort would be enough to go through the content. Some people around me have done that in 4 days too. 🙂
I am sure the people in your team would have questions while they are preparing for the exam. It would be a good idea to suggest them to ask their queries on this community, as there are experts here who can happily answer them.
Thanks!