Write a Python program that uses three variables. The variables in your program
will be animal, vegetable, and mineral. Assign a string value to each one of
the variables. Your program should display "Here is an animal, a vegetable, and
a mineral." Next, display the value for animal, followed by vegetable, and
finally mineral. Each one of the values should be printed on their own line.
Your program will display four lines in total.
