Consider the following line of code:

bool is$\_$full $=$ true;

SELECT ALL true statements:

Choice $1$ of $6$:true is an lvalue

Choice $2$ of $6$:is$\_$full is a Boolean literal

Choice $3$ of $6$:is$\_$full is an lvalue

Choice $4$ of $6$:is$\_$full in an rvalue

Choice $5$ of $6$:true is a Boolean literal

Choice $6$ of $6$:true in an rvalue