Find the Interquartile Range (IQR) of the following ordered dataset: $\{2.0, 3.0, 5.0, 7.0, 11.0, 13.0\}$ using the method where the median divides the dataset into a lower half $\{2.0, 3.0, 5.0\}$ and an upper half $\{7.0, 11.0, 13.0\}$.