Question: After working Exercise 21, write down eight matrices that form a group under matrix multiplication that is isomorphic to D 4 . Data from Exercise

After working Exercise 21, write down eight matrices that form a group under matrix multiplication that is isomorphic to D4.

Data from Exercise 21 

Verify that the six matrices form a group under matrix multiplication. 

1 0 0 0 1 0 00 1 3 0 1 0

What group discussed in this section is isomorphic to this group of six matrices? 

0 0 1 1 0 0 0 0 1 0 0 1

1 0 0 0 1 0 00 1 3 0 1 0 0 0 1 1 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 1 0 1 0 1 0 0 1 0 1 0 1 0 0 0 1 0 1 0 0 0 0 1

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