Set BarChart To Horizontal

I have been trying to turn a stacked barchart to be horizontal - and must be misunderstand what must be a simple solution to my problem.

using the Telerik Example for a stacked barChart - how do I set this so that the Representatives are on the vertical axis and the performance values are on the bottom horizontal axis as shown in the attached image.

Thank you in advance

            Dim barSeries As New Telerik.WinControls.UI.BarSeries("Performance", "RepresentativeName")
            barSeries.Name = "Q1"
            barSeries.DataPoints.Add(New CategoricalDataPoint(177, "Harley"))
            barSeries.DataPoints.Add(New CategoricalDataPoint(128, "White"))
            barSeries.DataPoints.Add(New CategoricalDataPoint(143, "Smith"))
            barSeries.DataPoints.Add(New CategoricalDataPoint(111, "Jones"))
            barSeries.DataPoints.Add(New CategoricalDataPoint(118, "Marshall"))

            Dim barSeries2 As New Telerik.WinControls.UI.BarSeries("Performance", "RepresentativeName")
            barSeries2.Name = "Q2"
            barSeries2.DataPoints.Add(New CategoricalDataPoint(153, "Harley"))
            barSeries2.DataPoints.Add(New CategoricalDataPoint(141, "White"))
            barSeries2.DataPoints.Add(New CategoricalDataPoint(130, "Smith"))
            barSeries2.DataPoints.Add(New CategoricalDataPoint(88, "Jones"))
            barSeries2.DataPoints.Add(New CategoricalDataPoint(109, "Marshall"))
            RadChartView2.Series.Add(barSeries2)
            barSeriesQ1.CombineMode = ChartSeriesCombineMode.Stack
            barSeries2.CombineMode = ChartSeriesCombineMode.Stack