function [ VG, sG ] = mmq_propaga_covariancias( dGdA, VA, FUN, Ac )
% [ VG, sG ] = mmq_propaga_covariancias( dGdA, VA, FUN, Ac )

if isempty( dGdA )
    dGdA = mmq_montaX( FUN, Ac );
end

VG = dGdA * VA * dGdA';
sG = sqrt( diag( VG ) );