1) Is the MS Excel 2003 Specialist Certification a prerequisite for taking
the MS Excel 2003 Expert Certification Exam?

2) Where can I get sample tests (Q&A) {preferably free} for the MS Excel
Expert 2003 Certification?

Or, where can I get practice exercises {preferably free} to prepare me for
the exam (other than those in the Benchmark Series - Excel 2003 Specialist &
Expert text book that I'm using)?