What report compares metrics based on user acquisition date over a series of weeks?

What report shows users who initiated sessions over 1-day, 7-day, 14-day, and 30-day periods?

Active Users report Cohort Analysis report Users Flow report User Explorer report Download Google Analytics Individual Certification Exam Answers (PDF)

What feature must be enabled to use Multi-Channel Funnels?

Advertising Features Goals or Ecommerce Custom Dimensions In-page Analytics Download Google Analytics Individual Certification Exam Answers (PDF)

In Multi-Channel Funnel Reports, how are default conversions credited?

First campaign, search, or ad Second to last campaign, search, or ad Last campaign, search, or ad Equal credit along the conversion touchpoints Download Google Analytics Individual Certification Exam Answers (PDF)