how to draw cam contour?

Hi,
I have a cam contour,but I don't know how to draw it with autocad.Below is data
Base circle is diameter 100.0 mm
0-90 degree Dwell
90-140 degree Modified trapezoid (-4mm)
140-310 degree Dwell
310-360 degree Modified trapezoid (4mm)
Thank you!
Tony
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