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Erratum: a) 1(1/4)^2+2(1/4)^2+3(1/4)^2 = 6(1/4)^2 = 6/16 = 3/8
a) 1(1/4)^2+2(1/4)^2+3(1/4)^2 = 6(1/4)^2 = 6/16 = 1/2 b) does not have the condition in a) it was not stated that way. 8/16

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