Consider the class hierarchy shown below:
    
    Animal
      |
    Mammal
    / / \ \
        /  /   \  \
      /   /     \   \
    /    /       \    \
  /     /         \     \
      /      /           \      \
    /       /             \       \
  /        /               \        \
Dog      Cat      Raccoon    Swamp
     (implements)     (implements) Thing
     ( Washer   )     ( Washer   ) 

Consider the following code:

1.  Cat sunflower;
2.  Washer wawa;
3.  SwampThing pogo;
4.  
5.  sunflower = new Cat();
6.  wawa = sunflower;
7.  pogo = (SwampThing)wawa;

Which of the statements below is true?