Category Distribution Analysis

#1
1 Have 5 categories of Products. A,B,C,D and E and 3 groups of stores Group 1, Group 2 and Group 3

Cateogory A products are distributed as 45% in Group 1, 30% in Group 2 and 25% in Group 3.
Within Group 1 Category A contributes 35 % of products of all categories.

Please let me know how to analyze this category performance across groups and category performance across categories.