Still not really a lot of info, but still.

Create a cluster column on all 4 columns of data.
select the a series you want as line and change the chart type to line.
repeat for other series.

This will give you lines that are placed in the middle of the 2 colulmns.
If you want lines in the middle of each individual column you will need to plot xy-scatter rather than line chart and you will need to provide individual X values for each data point.