CJA- email opens across multiple emails

Hello- I have a list of 12 campaigns that a marketer is looking to get some metrics for within CJA. Looking across all 12 campaigns: 

1. People who didn’t open any email the selected campaigns 
2. People who opened only 1 email during the past 12 months
3. People who had 2 or more opens during the past 12 months

We have a unique email open metric that de-dupes at the person level and we keep the first instance based on the delivery label. How do I look across multiple campaigns to see if someone only opened one or two?