\( \begin{array}{l}=\operatorname{INDEX}(B 1: B 20, \operatorname{MATCH}(E 4, A 2: A 20,0)) \\ =\operatorname{INDEX}(B 2: B 20, \operatorname{MATCH}(E 4, A 2: A 20,0)) \\ =\operatorname{MATCH}(E 4, I N D E X(B 1: B 20), 0) \\ =\operatorname{MATCH}(E 4, I N D E X(B 2: B 20), 0)\end{array} \)