 \rightarrow  H^0(E, T_E(E)) \rightarrow \mathbb{H}^0(B',L_{(f',i')}^\vee) \rightarrow  \mathbb{H}^0(B, L_{(f,i)}^\vee ) \rightarrow 0 \\   0 \rightarrow \mathbb{H}^0(B',L_{(f',i')}^\vee) \rightarrow \mathbb{H}^0(B,  L_{(f,i)}^\vee ) \rightarrow 0\end{aligned}$$ 