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).

- Update the documentation and comments in your program to reflect
these changes.
- Save and print your work.