The formula for converting a temperature from Fahrenheit to Celsius is

C=5/9(f-32)

And the formula for converting from Celsius to Fahrenheit is

F=9/5*C + 32

Write a function named celsius that accepts a Fahrenheit temperature as an argument, and returns that temperature converted to Celsius. Write another function named fahrenheit that accepts a Celsius temperature as an argument, and returns that temperature converted to Fahrenheit.

Demonstrate the first function by calling it in a loop that display a table of Fahrenheit temperatures 0 through 20, and their Celsius equivalent. Demonstrate the second function by calling it in a loop that display a table of Celsius temperatures 0 through 20, and their Fahrenheit equivalent.