Draw the three principal projections (front, top, and side view) of a line AB, 70mm long, parallel to the profile plane, with A at 25mm from VP and 30mm above HP.

Since line is parallel to profile plane, it's perpendicular to both HP and VP
Front view: Line appears as a point
Top view: Line appears as a point
Right side view: Line shows true length (70mm)
Plot A at given distances in all three views
Complete the three-view projection