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The moment of inertia tensor of a set of point masses is defined below.

You have been sent details of the tensor for your space station modelled as an array of point masses. The array is listed below but some entries have been covered by coffee stains marked A and B.

7. What is the figure covered by stain B?

8. Deduce the figure covered by stain A?

Fig: 1

Fig: 2

Fig: 3