Nine groups are given below. Give a complete list of all subgroup relations, of the form G

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Nine groups are given below. Give a complete list of all subgroup relations, of the form Gi ≤ GJ, that exist between these given groups G1, G2, • • •, G9• 

G1 = Z under addition 

G= 12Z under addition 

G3 = Q+ under multiplication 

G4 = R under addition 

G= JR+ under multiplication 

G6 = {πn |n E Z} under multiplication 

G7 = 3Z under addition 

G8 = the set of all integral multiples of 6 under addition 

G9 = {6n |n E Z} under multiplication

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