It is necessary to build a diagram in Excel based on the coordinates of 2 vertex groups. Here is how the constructed graph should look like and the corresponding coordinates of the vertices: 
The problem is that I do not know how to specify the coordinates of the vertices for the data ranges. The coordinates themselves (illustrated), for example, are:
XY ----------- 5 16 5 13 5 10 5 7,5 5 3,5 and
XY ----------- 12,5 15 12,5 8 