Solved I know the answer to A is Fleiss' kappa, but am | Chegg.com
PDF] Large sample standard errors of kappa and weighted kappa. | Semantic Scholar
Fleiss Kappa for Inter-Rater Reliability | James D. McCaffrey
AgreeStat/360: computing weighted agreement coefficients (Conger's kappa, Fleiss' kappa, Gwet's AC1/AC2, Krippendorff's alpha, and more) for 3 raters or more