What is the output of the following Python code ?
s1 = "Chuck" s2 = s1 s2 += " Norris" d1 = {"FirstName": "Chuck"} d2 = d1 d2["LastName"] = "Norris" print(s1, d1)
Chuck {"FirstName": "Chuck"}
Chuck {"FirstName": "Chuck", "LastName": "Norris"}
Chuck Norris {"FirstName": "Chuck"}
Chuck Norris {"FirstName": "Chuck", "LastName": "Norris"}