Answer
The model is shown in the picture and it is drawn using wedges, dashes and lines on the lower right corner.
Work Step by Step
Since it is a propane there are three carbons. So connect the three carbons using bonds. Then connect hydrogens in the remaining holes of the carbon ball.
Looking at the model, make wedges, dashes and lines. (Wedges come out, dashes go in and lines stay on the same plane.
