Arrange the following three-dimensional objects in the descending order of their volumes:
- A cuboid with dimensions $\text{10 cm, 8 cm and 6 cm}$
- A cube of side $\text{8 cm}$
- A cylinder with base radius $\text{7 cm}$ and height $\text{7 cm}$
- A sphere of radius $\text{7 cm}$
- $\text{i), ii), iii), iv)}$
- $\text{ii), i), iv), iii)}$
- $\text{iii), ii), i), iv)}$
- $\text{iv), iii), ii), i)}$