Plot a Tetrahedron in 3D using excel chart with known 3D (X,Y,Z) coordinates

[Sunny Baggu]

Hii, Greetings!
I want to Plot a Tetrahedron in 3D using excel chart with known 3D (X,Y,Z) coordinates.
Lets say my known coordinates are:

Now if you see carefully, the Z-coordinates for center of gravity is 12307 mm which is different from points G1,G2,G3,1,2,3 and 4.
The requirement for me is to plot COG in 3D view and connect it CoG (TIP) to all the other points at 2000 mm level i.e., with points G1,G2,G3,1,2,3 and 4.
In simple words, along with the plan and in 3 D view all the coordinates should be connected, i.e, CoG(6) with G1, CoG(6) with G2, CoG(6) with G3, CoG(6) with point 1, CoG(6) with point 2, CoG(6) with 3, and CoG(6) with point 4.
In 3D view , its looks like below:

And the coordinates are as below in the table :

	Horizontal	Vertical
Points	X (mm)	Y (mm)	Z (mm)
G1	18000	16500	2000
G2	6100	5700	2000
G3	29900	5700	2000
G1	18000	16500	2000
	Horizontal	Vertical
Env. Pos	X (mm)	Y (mm)	Z (mm)
P1	14717	6923	2000
P2	20907	6923	2000
P3	20907	8986	2000
P4	14717	8986	2000
P1	14717	6923	2000
Center of gravity coordinates
	X (mm)	Y (mm)	Z (mm)
COG (6)	17812	7954	12307

Please suggest for any ideas or tips about the same to proceed further.
Thank you in advance for any help.