\begin{table}[htbp]
\centering\footnotesize
\caption{Task B — MASE of equal-weight combinations versus their components (same cells and origins)}\label{tab:combo_b}
\begin{threeparttable}
\begin{tabular}{lrrrr}
\toprule
Forecast & h=1 & h=3 & h=6 & h=12 \\
\midrule
LightGBM (panel) & 0.871 & 0.754 & 0.749 & 0.756 \\
QANSS & 0.931 & 0.831 & 0.840 & 1.077 \\
Ridge (panel) & 0.969 & 0.839 & 0.886 & 1.211 \\
AR(2), cell & 0.983 & 0.897 & 0.807 & 0.630 \\
QREFA & 0.956 & 0.816 & 0.833 & 1.012 \\
Equal weights: LightGBM + QANSS & 0.870 & 0.760 & 0.735 & 0.845 \\
Equal weights: LightGBM + AR(2) & 0.892 & 0.787 & 0.751 & 0.673 \\
Equal weights: LightGBM + QANSS + ridge + AR(2) & 0.891 & 0.765 & 0.736 & 0.777 \\
Equal weights: four models + no change & 0.898 & 0.779 & 0.729 & 0.672 \\
\bottomrule
\end{tabular}
\end{threeparttable}
\end{table}