Exponential Log Numbers
Here I used 1.16 as an Exponent - ( Scroll in and out with Mouse, to clear Graphics, when button is in the Stop Position, please. )
1) Notice when you type in the prescribed values which numbers are shown for variables a, c, d, e.
2) Press Play at Bottom Left to see Design (I guess make design first, then, when 'Stop Play' is 'checked' go ahead and check the values to see b & c.)
3) I made it a little interesting by making the two points to be masses that orbit each other.
see instructions