Questions regarding Time buckets in an S&OP planning view

I have three questions relating to time buckets in S&OP planning views:

1. Is it possible to have a mixture of time buckets in an S&OP planning view, for example first 12 months in months, then next 12 months in quarters (as can be done with time bucket profiles in APO planning book data views for example)?

2. Is it possible to configure fiscal accounting periods as time buckets (as can be done in APO for example)?

3. Is it possible to use weekly buckets?

Thanks for any advice here...