In Fig. , we provide representative data for the quantity in angular brackets for each of the transport coefficients to demonstrate that our simulations are long enough to reach the linear regime. The standard procedure for fitting Eqs. (3), (4), or (5) to obtain the corresponding transport coefficient entails choosing a time regime in which the quantity in angular brackets is approximately linear, then performing a linear regression on the quantity in angular brackets to obtain a slope. However, the ordinary method of least squares is only an optimal fitting procedure if each of the data points has the same finite variance. The quantities in angular brackets in Eqs. ( ), (4), or