Assume that the operators $+,-,\times$ are left associative and $\wedge$ is right associative. The order of precedence(from highest to lowest) is $\wedge,\times, +,-$. The postfix expression corresponding to the infix expression $a+b\times c-d\wedge e\wedge f$ is
- $abc\times+def\wedge\wedge-$
- $abc\times+de\wedge f\wedge-$
- $ab+c\times d-e\wedge f\wedge $
- $-+a\times bc\wedge\wedge def$