Q$6[2$pts$]$ Which of the following heuristics are consistent in this problem? Recall that a heuristic h$($n$)$ is consistent if$,$ for every node n and every successor n$$ of n generated by an action a$,$ we have: h$($n$)<=$ c$($n$,$a$,$n$)+$h$($n$).($AIMA $4$th Ed$.$ Section $3\mathrm{.}5\mathrm{.}2)$ Select all that apply. Multiple select. $1.$ h$1($n$)=$ C$,$ where C is a real number constant $<=22.$ h$2($n$)=$ C $$g$($n$),$ where C is a real number constant $<=23.$ h$3($n$)=2$g$($n$)4.$ h$4($n$)=2$g$($n$)$