You can carfully wedge something in between the key and gently pull up 
        
             
        
        
        
Answer:
<u>Window.java</u>
- public class Window {
-     int width;
-     int height;
- 
-     public Window(int width, int height){
-         this.width = width;
-         this.height = height;
-     }
-     public int getWidth(){
-         return width;
-     }
-     public int getHeight(){
-         return height;
-     }
- 
-     public int getClientAreaHeight(){
-         return getHeight();
-     }
- }
<u>Main.java</u>
- public class Main {
-     public static void main (String [] args) {
-         Window win1 = new Window(12, 15);
-         System.out.println(win1.getClientAreaHeight());
-     }
- }
Explanation:
<u>Window.java</u>
There is a Window class with two int type attributes, width and height (Line 1 - 3). 
The constructor of this class will take two inputs, width and height and set these input to its attributes (Line 5 - 8). There are two methods getWidth and getHeight which will return the value of attributes width and height, respectively (Line 10 - 16). 
The required new method getClientAreaHeight is defined in line 18 -20. This method will call the getHeight method to return the height value of the window (Line 19). 
<u>Main.java</u>
We test the Window class by creating one Window instance and call the getClientAreaHeight method and print the return output (Line 1 -6).
We shall see 15 is printed.
 
        
             
        
        
        
Answer: Falsifiability
Explanation: Falsifiability is the term that is defined as the evaluation of any particular hypothesis or theory to be proven wrong .This feature gives the access that the theory can be tested and have more accurate claims .
The ESP(Extrasensory perception) theory  can also have feature of being falsifiable because the experiments and test lead to the issue that the negative effects of the theory are not certain which might occur due to simple observation of effects.
 
        
             
        
        
        
Depends really. Have you got prior coding experience? The semantics of certain languages are much easier to pick up if you've had prior experience, but it might seem impossible to someone who has minimal experience. 
Assuming that you're no older than 15 or 16, I'm going to suggest Python. It's a simple, high-level language that's easier to understand than most languages. If you think you've got enough experience to quickly understand and pick up things, then I'd probably say R is a good language to start with. It's very well-suited for AI and tends to be a favourite for AI researchers.
 
        
             
        
        
        
Answer:
Array, pointers, struct, and union are the derived data types.