I have three charts, each of which shows a normal curve (bell shaped) with 3
different means and 3 different standard deviations. Taken individually, the
3 charts are a "masterpiece."

However, I wish to merge the three charts into one so I can show the 3 bell
shapes on one graph. The best way to further explain is to cite this example:

Chart 1 X axis 10 through 160
mean 80
std. dev. 20

Chart 2 X axis 60 through 120
mean 90
std. dev. 10

Chart 3 X axis 20 through 150
mean 85
std. dev. 25

In other words, the data points overlap for each graph; however, the 'width'
of the X axis is different for each graph; in addition, the height (mean) of
each graph is, also, markedly, different.

HOW CAN I MERGE THESE THREE GRAPHS TOGETHER TO SHOW ONE GRAPH WITH THE 3
BELL CURVES?

Thanks,

FLKulchar