update readme

README.md

@@ -19,6 +19,7 @@ Reading and Assignment will be updated each week as the class progresses.
 * Week 9: [IE] Ch.14; [E] Ch.9.9--10, 16--18
 * Week 10: [E] Ch.17. 1--12, 15--17, 20, 21, 24, 25, 36, 37; Ch.12.1, 2, 4-6, 40, 41
 * Week 11: [E] Ch.12.7--10, 12, 15--18; Ch.13.1--12
+* Week 12: [E] Ch.13.19--22, 25
 
 ### Assignment
 
@@ -33,6 +34,7 @@ Reading and Assignment will be updated each week as the class progresses.
 * Week 9: [IE] Ex 14.1, 4, 7; [E] Ex 9.4, 5, 7, 17, 19
 * Week 10: [E] Ex 17.1(a), 2, 6, 13; Ex 12.5
 * Week 11: [E] Ex 12.3, 4, 7, 8, 11, 20; Ex 13.2, 3
+* Week 12: No assignment
 
 
 
@@ -80,7 +82,7 @@ I encourage anyone, in particular students taking my class, to contribute or imp
 
 ### Lecture Hours
 
-Friday 8:30—11:15 am. [Zoom link](https://cuhk.zoom.us/j/92063037640).
+Friday 8:30—11:15 am.
 
 The course will be taught online until further notice.