(a) Using models when necessary, draw a Newman projection and a sawhorse projection corresponding to the following lineand-wedge structure. Project the C2-C3 bond, with carbon-2 nearer the observer, and simplify your structures by abbreviating large groups.
(b) In your Newman projection, rotate carbon- 2 clockwise by $120^{\circ}$ about the C $2-\mathrm{C} 3$ bond, and draw both sawhorse and lineand-wedge structures for the resulting conformation.
(c) In your Newman projection of part (a), rotate carbon- $2180^{\circ}$ about the C2-C3 bond, and draw both sawhorse and line-andwedge structures for the resulting conformation.