We’re all tired at this point in the semester

### Oh no: a student who fell asleep when reading about swapping. They wrote the following invalid code. ``` for y in range(len(img)): for x in range(len(img[y])//2): img[y][x] = img[y][len(img[y])-x-1] img[y][len(img[y])-x-1] = img[y][x] ``` What will happen if we use this code? 1. [ ] The flipped version of the left half of ``img`` will be assigned to the right-half 2. [ ] The left half of the ``img`` will be blacked out 3. [x] The flipped version of the right half of ``img`` will be assigned to the left-half 4. [ ] The right half of the ``img`` will be removed