hi! i am trying to graph some information with tableau. i have one data source, "Big", that has numbers around 100, 110, and 120. i have another data source, "Small", that has numbers around 50, 55, and 60. I want to graph them as a stacked bar graph, such that the first bar will be 100 units tall as per that column in Big, with the corresponding 50 units from Small's column overlayed in front of the Big's bar. how would i do this?