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![]() R4 (a)1,7
R5 (a)6, (b) 4,7,10 (c)5 R6 (a)7 (b)1,5 R7 (a)1 (b)4 R8 (a)6 (b)2,5 (c)4 R9 (a)4,7,8, (c)3 |