<image>A student is conducting a social survey and has randomly sampled the income situation of 20 households in a certain area, and has produced a statistical chart (as shown in the figure). 

Based on the information provided by the statistical chart, please answer:
(1) The average annual income of these 20 households is ______ ten thousand yuan;
(2) The median of the sample is ______ ten thousand yuan and the mode is ______ ten thousand yuan;
(3) Among the average and the median, ______ better reflects the annual income level of households in this area.