diff --git a/journal/log_book_of_Yifan_XU_for_mooc-rr.md b/journal/log_book_of_Yifan_XU_for_mooc-rr.md
index c4e05e14e649f901d9156718f5b051a7bcf9cc8b..8de6a8d55fa0f22a24efee537c89531a7ee281f0 100644
--- a/journal/log_book_of_Yifan_XU_for_mooc-rr.md
+++ b/journal/log_book_of_Yifan_XU_for_mooc-rr.md
@@ -82,12 +82,16 @@ To be honest, I found that some quizzes in this mooc are quite confusing, espici
 
 
 ## exercise 3-1:
-The task is to modify the given jupyter notebook. Use a local file contaning the data instead of a url. If this file doe not exist, download it from the website of Réseau Sentinelles. Note that 
+State: finished.
+
+Note: The task is to modify the given jupyter notebook. Use a local file contaning the data instead of a url. If this file doe not exist, download it from the website of Réseau Sentinelles. Note that 
 the download link has changed. The old one is "http://www.sentiweb.fr/datasets/incidence-PAY-3.csv". We shoudl use the new one: "https://www.sentiweb.fr/datasets/all/inc-3-PAY.csv". 
 More importantly, when run the code "sorted_data['inc'].plot()", there is an error. I checked my code carefully. It is correct. So it seemd to be a problem of this MOOC system. 
 
 ## exercise 3-2:
-This task is to perform the same analysis of the incidence of influenza-like illness to the incidence of chickenpox. The downloaded url is "https://www.sentiweb.fr/datasets/all/inc-7-PAY.csv". We can download it from the website of
+State: finished.
+
+Note: This task is to perform the same analysis of the incidence of influenza-like illness to the incidence of chickenpox. The downloaded url is "https://www.sentiweb.fr/datasets/all/inc-7-PAY.csv". We can download it from the website of
 Réseau Sentinelles and find this url in the browser download history. Note that there is no missing data points in this data file, and this exercise requires to choose September 1st as the beginning of each annual period. For other details, please see 
 my jupyter notebook for the exercise 3-2.