8. Download, unzip and open the Greenfoot world WJECAquarium and familiarise yourself with its contents.
(a) Populate the world with a crab, at least two sharks and at least two fish. 
(b) Edit the fish and sharks so that they turn and move randomly. 
(c) Edit the program code to make the crab move at an appropriate speed in the direction of the arrow keys when pressed. 
(d) Edit the crab so that it “eats” a fish when they collide (removes the fish from the world). 
(e) Add a sound which will play every time the crab “eats” a fish. 
(f) Add a counter and edit the code so that the counter displays how many fish have been “eaten” by the crab. 
(g) Edit the code so that the counter loses a point (1 point is deducted) if the shark “eats” a fish. 
(h) Save your completed world as FullAquarium. 
Have you zipped up your completed world folder?
**Remember to upload your zipped folder of your completed world on the Resource page. Click on tab 1**