bandpass - Filtering Frequency Bands Out of a Signal

Let's say I have a 2 second data set taken at 220Hz sample rate and I would like to filter out the frequency bands associated with the EEG Spectrum: $$\begin{align} \Delta:& [1,3]\text{ Hz}\\ \theta:& [4,7]\text{ Hz}\\ \alpha_1:& [8,9]\text{ Hz}\\ \alpha_2:& [10,12]\text{ Hz}\\ \beta_1:& [13,17]\text{ Hz}\\ \beta_2:& [18,30]\text{ Hz}\\ \gamma_1:& [31,40]\text{ Hz}\\ \gamma_2:& [41,50]\text{ Hz} \end{align} $$ What would be the most simple approach to do this ?