Conditional Feature Writing Based on Multiple Readers with ID Filtering

I have a workflow involving three readers (Reader 1, Reader 2, and Reader 3), and I need help setting up conditional logic based on feature counts for a given ID.

Here's what I'm trying to achieve:

1. All three readers are filtered by the same ID.

2. Condition 1:

   • If both Reader 1 and Reader 2 have at least one feature for the given ID, then do nothing—no features should be written to the writer.

3. Condition 2:

   • If Reader 1 has at least one feature, but Reader 2 has zero features for the given ID, then:
     • Write the feature from Reader 3 that matches the given ID to the writer.

I'm looking for the best way to implement this logic in FME. 
 

Thanks for any advice or examples!