(The formula for converting a temperature from Fahrenheit to Celsius is
C=5/9(F-32)
Where F is the Fahrenheit temperature and C is the Celsius temperature. Write a function named celsius that accepts a Fahrenheit temperature as an argument. The function should return the converted Celsius temperature.
Demonstrate the function is correct by calling it in a loop that displays a table of the Fahrenheit temperature 0 through 20 and their Celsius temperature equivalents)