QUESTION $4(22$ MARKS$)($please answer it step by step$)($ note : this is on an exam paper so i cant code anything to get the answer$)$

a$)$ The following vertices define a face in $3D$ : $\{(-3,-3,1),(1,3,1),(3,-3,1),(-1,3,1)\}.$

Change the sequence of vertices as listed so that openGL will draw the normal to this

face with a positive $z$ component.

$(4$ marks$)$