fix this code : def factorial(n): if n == 0: return 1 else: return n * factorial(n-1) صحح الكود التالي : def calculate_average(numbers): total_sum = 0 for num in numbers: total_sum = total_sum + number

Here are the corrections needed for the provided code:

1. There is a typo in the variable name inside the loop; it should be `num` instead of `number`.
2. The variable `nums` is undefined; it should be `numbers` when calling the `calculate_average` function.

Here's the corrected code:

```python
def calculate_average(numbers):
    total_sum = 0
    for num in numbers:
        total_sum = total_sum + num  # Changed 'number' to 'num'
    average = total_sum / len(numbers)
    return average

numbers = [10, 20, 30, 40, 50]
print("The average is:", calculate_average(numbers))  # Changed 'nums' to 'numbers'
```

Now the code should work correctly and calculate the average of the list of numbers.