Final answer:
The dictionaries' key-value pairs are shown after executing the given statements.
Step-by-step explanation:
The output will be a dictionary with the following key-value pairs:
- 'susan': 51
- 'jim': 45
- 'joan': 54
- 'john': 53
The initial empty dictionary d is first created. Then, key-value pairs are added to the dictionary, with the keys being the names and the values being the numbers. When a key is assigned a new value, the old value is overwritten. Finally, the dictionary d is printed, showing the updated key-value pairs.