input: Write a function that converts a temperature from Fahrenheit to Celsius. The function should take a single argument, the temperature in Fahrenheit, and return the temperature in Celsius. Use the formula (F - 32) * 5/9 to perform the conversion.
  
  assert FahrenheitToCelsius(32) == 0
  assert FahrenheitToCelsius(212) == 100
  assert FahrenheitToCelsius(-40) == -40
  assert FahrenheitToCelsius(68) == 20
  assert FahrenheitToCelsius(98.6) == 37
output: def FahrenheitToCelsius(F):
      return (F - 32) * 5/9