IWhen using a Stack to convert an infix expression to a postfix expression, which of the following is True?

Select one:

Operators are pushed onto the Stack, after cross out popping off any operators with a lower precedence.

Closing brackets are pushed onto the Stack, after cross out popping off everything until an open bracket is reached.

Operands are pushed onto the Stack, and popped cross out off when an operator is encountered.

Operators are pushed onto the Stack, after cross out popping off any operators with higher or equal precedence.