modified: part1/simple_detector.md

src/docs/part1/simple_detector.md

@@ -328,6 +328,10 @@ Look at the generated plot in `results`:
 
 ![z_position](../z_position_part1.png)
 
+### Homework
+
+Can you adjust the compact description so that layers 4 and 5 have similar number of hits as the other layers? 
+
 ## References
 
 - [NPdet](https://eic.phy.anl.gov/npdet/)