Alternate solution for number 3: Usage Funnels

[h1lo]

https://www.codecademy.com/paths/data-science/tracks/analyze-data-sql-analyze-real-data/modules/analyze-data-sql-usage-funnels/lessons/sql-funnels/exercises/compare-funnels

select modal_text, count(distinct user_id) as control_clicks 
from onboarding_modals where ab_group = 'control'
group by 1;