Explain the conformers of the Newman projection with an example.

(N/A) Newman projection :
$(i)$ In this projection,the molecule is viewed along the $C-C$ bond head-on.
$(ii)$ The carbon atom nearer to the eye is represented by a point. Three hydrogen atoms attached to the front carbon atom are shown by three lines drawn at an angle of $120^{\circ}$ to each other.
$(iii)$ The rear carbon atom (the carbon atom away from the eye) is represented by a circle and the three hydrogen atoms are shown attached to it by lines drawn at an angle of $120^{\circ}$ to each other. At the end of all lines,$H$ is written.
$(b)$ Example: Eclipsed ethane and staggered ethane are shown below: