Update Exercise 3 (submission format)

ex3/README.md

@@ -22,7 +22,7 @@ The important part of the code that you need to modify is the lookup table part:
 
 As you can see, at the moment it is very basic and the elevation can not be represented accurately.
 
-**Summary of Tasks:** Implement a new transfer function that visualizes the elevation of the world map in a meaningful way.
+**Summary of Tasks:** Implement a new transfer function that visualizes the elevation of the world map in a meaningful way. Save your submission code as `task1.py`.
 
 ## Task 2: Pre- and Post-Classification (1P)
 
@@ -50,7 +50,7 @@ to more accurately represent the interpolated dataset  values:
 
 This behavior can easily be switched on or off in VTK. Look through the code and find the part that switches between Pre- and Post-Classification. Additionally, for better seeing the differences, we want to switch between the two modes seamlessly.
 
-**Summary of tasks**: Find out which method is responsible for the different classification types. Additionally, implement a switch that cycles between Pre- and Post-Classification by pressing a button on your keyboard.
+**Summary of tasks**: Find out which method is responsible for the different classification types. Additionally, implement a switch that cycles between Pre- and Post-Classification by pressing a button on your keyboard. Save your submission code as `task2.py`.
 
 ## Task 3: Scattered Data (2P)
 
@@ -79,4 +79,4 @@ Your result should look like this:
 
 <img src="img/delaunay.png" width="300">. 
 
-**Summary of Tasks:** Create a complete pipeline which renders the Delaunay Triangulation of the given dataset.
+**Summary of Tasks:** Create a complete pipeline which renders the Delaunay Triangulation of the given dataset. Save your code as `task3.py`.