In the retention app, use the same query you built in question 59 and change split by to the actor property in question 60.
Build a retention query in the retention app that is the same as the query built in question 59. However in this query split it by the actor property created in question 60 to show all users rolled up into one goup. Using the retention app build a query that returns During 8 weeks after each users first ever event with action that matches purchase for user actors with the actor property created in question 39 that matches "High purchasers". Split by the actor property created in question 60 limit 10 order ascending. Start from the beginning of time end now.
Cleaning up the split by in the retention app is helpful to better understand the query logic. Using a simple count of users can do this
Note: The numbers and result do not need to be an exact match as the data changes over time. The query construction is what is most important. See images below.
*Click to enlarge*