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A study uses a stratified design with three strata of sizes N1=300,N2=500,N3=200N_1 = 300, N_2 = 500, N_3 = 200N1​=300,N2​=500,N3​=200. If the total sample size is n=100n = 100n=100, what are the proportional sample sizes n1,n2,n3n_1, n_2, n_3n1​,n2​,n3​?