Consider the following statements regarding the projections of solids : 1. When the axis of a solid is perpendicular to a plane, its base will be parallel to that plane. 2. The projection of a solid on the plane to which its axis is perpendicular, will show the true shape and size of its base. 3. When the axis is perpendicular to the HP, the top view should be drawn first and the front view projected from it. 4. A solid in simple position has its axis parallel to one reference plane and perpendicular to other. Which of the following statements are correct ?