Mark all that apply by writing $F($for false$)$ or $T($for true$)$ in the

blank before each item.

In an operator precedence parser, given any two symbols a and

$b$ where $a$ is at the stack top and $b$ is the next symbol:

Both a and $b$ must be terminals.

$b$ must be a terminal but a can be either

a terminal or a nonterminal.

If $ab,$a must be reduced an popped

out of the stack before $b$ is pushed onto the stack.

If both $ab$ and $ab,b$ must be

pushed onto the stack.