Using the provided distance table, calculate the travel distance in kilometers between the following cities: a) Durban to Port Elizabeth, b) Pretoria to Queenstown, and c) Windhoek to Upington.

The distance at their intersection is $1434 \text{ km}$.
The distance from Durban to Port Elizabeth is $\boxed{\text{1434 km}}$.

The distance at their intersection is $905 \text{ km}$.
The distance from Pretoria to Queenstown is $\boxed{\text{905 km}}$.

The distance at their intersection is $830 \text{ km}$.
The distance from Windhoek to Upington is $\boxed{\text{830 km}}$.

**3.