Let's break down the steps to understand the expected result of the code.
1. Initialize the `rates` tuple:
```python
rates = (1.2, 1.4, 1.0)
```
Here, `rates` is a tuple containing three values: 1.2, 1.4, and 1.0.
2. Create a new tuple `new` identical to `rates`:
```python
new = rates[:]
```
The slicing operation `rates[:]` creates a copy of the `rates` tuple, so `new` is also `(1.2, 1.4, 1.0)`.
3. Iterate over the last two elements of `rates` and add them to `new`:
```python
for rate in rates[-2:]:
new += (rate,)
```
- `rates[-2:]` slices the `rates` tuple to obtain its last two elements. This results in the tuple `(1.4, 1.0)`.
- The iteration will add each element of `(1.4, 1.0)` to `new`.
- First, `rate` will be 1.4 and `new += (1.4,)` makes `new` equal to `(1.2, 1.4, 1.0, 1.4)`.
- Next, `rate` will be 1.0 and `new += (1.0,)` makes `new` equal to `(1.2, 1.4, 1.0, 1.4, 1.0)`.
4. Calculate and print the length of the `new` tuple:
```python
print(len(new))
```
The `new` tuple now contains 5 elements: `(1.2, 1.4, 1.0, 1.4, 1.0)`. Thus, the length is 5.
Therefore, the expected result of this code is:
```python
5
```
