input: Write a function to convert a given temperature value from Fahrenheit to Celsius. The function should take a single argument, `temp`, which represents the temperature in Fahrenheit, and return the temperature in Celsius rounded to two decimal places.
  
  def fahrenheit_to_celsius(temp):
      celsius = (temp - 32) * 5/9 
      return round(celsius, 2)
  
  assert fahrenheit_to_celsius(32)==0.0
  assert fahrenheit_to_celsius(212)==100.0
  assert fahrenheit_to_celsius(68)==20.0
  assert fahrenheit_to_celsius(0)==-17.78
  assert fahrenheit_to_celsius(-40)==-40.0
output: def fahrenheit_to_celsius(temp):
      celsius = (temp - 32) * 5/9 
      return round(celsius, 2)