How to Make a Nested Donut Chart

Problem:
How do I create a nested donut chart in which every layer has different number of slices? e.g. 3 slices in the 1st, 9 slices in the 2nd and 3 slices in the 3rd.

Solution:
This demo has got 3 slice in 1st, 9 slices in 2nd and 3 slices in 3rd layer. Please use it for reference. You can read here for more details on how to make a nested donut chart.