Find Generators and relations analogous to (2.13) for the Klein four group.?

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Find Generators and relations analogous to (2.13) for the Klein four group.?
(2.13) i^4=1, i^2=j^2, ji=(i^3)j.
(a) Find Generators and relations analogous to (2.13) for the Klein four group.

(b) Find all subgroups of the Klein four group.

Please show steps! Thank you.
 
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Well, what IS the Klein 4 group? It has only 4 members. You ought to be able to write out the operation table and get this immediately.
 

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