\(\forall j\in\{1,2,3\},\exists a\in[-1,1],f_j(a)=1\)
\(\exists j\in\{1,2,3\},\forall a\in[-1,1],f_j(a)=1\)
\(\exists a\in[-1,1], \forall j\in\{1,2,3\},f_j(a)=1\)
\(\forall a\in[-1,1], \exists j\in\{1,2,3\},f_j(a)=1\)