I created a box plot for my data from a marked line chart (it includes, min, max, 25, 50, 75 percentiles and has a box showing the IQR (25-75 %tile). I also would like to show the mean on this graph, but when I add that data, the box no longer includes the correct data. Is there a way to add this and/ or superimpose a second chart with only means on top of this one?