Supplementary Assignment:
More Enhancements to the Aquarium Program

For this assignment you will enhance the Aquarium program.

• Add two new public member functions, Ascend and Descend to the AquaFish class. Each function should cause the fish to move up or down by one y-coordinate value. (Remember that ascending means going to a lower y-coordinate value and descending means going to a higher one.)

• Modify your main function to allow fish to ascend or descend before moving forward, according to the following formula:
  • A fish at the surface has a 5/6 chance of descending (and a 1/6 chance of staying at the surface).
  • A fish at the bottom has a 1/6 chance of ascending (and a 5/6 chance of staying at the bottom).
  • A fish that is neither at the surface nor at the bottom has a 1/6 chance of ascending and a 1/6 chance of descending (and a 2/3 chance of staying at the same depth).
  Research the full AquaFish Interface to determine how to tell whether a fish is at the surface, at the bottom, or somewhere in between.

• Update the documentation and comments in your program to reflect these changes.

• Save and print your work.