diff --git a/chirps_as_probing_signals.md b/chirps_as_probing_signals.md
index 5b5d20c..8dc8ac3 100644
--- a/chirps_as_probing_signals.md
+++ b/chirps_as_probing_signals.md
@@ -19,19 +19,16 @@ Dimensionalities involved, The beat frequency, the distance (contrast), the chir
 
 ### 1. Work out the difference between AMs induced by self and foreign generated chirps
 
-#### a) Illustrate the difference
+#### a) Illustrate the difference --> Done
 
 * Do this for one or two beat frequencies.
 * Use a range of contrasts.
 
 #### b) Work out the detectability of a foreign fish
 
-* assume a certain level of noise (added to the EOD signal) and 
-
+* assume a certain level of noise (added to the EOD signal)
 * without chirps
-
 * with self-generated chirps
-
 * with foreign generated chirps
 
 ### 2. Use Alex' model to get the P-unit responses