Implement the following functions:
(a) Function Celsius returns the Celsius equivalent of a Fahrenheit temperature, using the calcuation: C = 5.0 / 9.0 * (F-32);
(b) Function fahrenheit returns the Fahrenheit equvalent of a Celsius temperature, using the calculation: F = 9.0/5.0 * C +32;
(c) Use these functions to write a script that enables the user to enter eigher a Fahrenheit or a Celsius temperature and displays the Celsius or Fahrenheit equivalent. The HTML5 document should contain two buttons -- one to initiate the conversion from Fahrenheit to Celsius and one to initiate the conversion from Celsius to Fahrenheit.