diff --git a/reading/000_Introduction to Probability, Statistics, and Random Processes/README.md b/reading/000_Introduction to Probability, Statistics, and Random Processes/README.md
index e923a20..282aebd 100644
--- a/reading/000_Introduction to Probability, Statistics, and Random Processes/README.md	
+++ b/reading/000_Introduction to Probability, Statistics, and Random Processes/README.md	
@@ -8,9 +8,11 @@ total pages=1007
 
 TODO:
 
-- ch1 end of chapter problems
 - ch2 end of chapter problems
 - 3.1.6 problems
 - 3.2.5 problems
 - ch3 end of chapter problems
 - 4.1.4 problems
+- 4.2.6 problems
+- 4.3.3 problems
+- ch4 end of chapter problems