This is rather simple. You can do it in your head and bash through the ideas, or you can look in the CAP698 (which is issued in the exam) on page 64 and 65 and you see the second table from the bottom gives you EXACTLY what your after. That table is for minV1 (CMG). It tells you the minimum V1 possible, which is actually Vmcg, so this table is actaully Vmcg, and it even tells you it is.
Know the CAP manual, out of 184 questions in the current feedback, about 30% can be answered by looking at the manual. Thats of course if you had an instructor that taught you this and knows performance. Know the CAP manual it can save a lot of time and nasty exam confussing thoughts.
Hope this helps.