Answer
See the figures below.
Work Step by Step
The author here asks for drawing 3 sketches:
a) The interaction diagram.
b) The system.
c) The force diagram.
You can see all of these sketches below.
Noting that the net force exerted on the brabell or the weightlifter is zero since he is stationary and standing up at a constant speed which means that the barbell is also moving up at a constant speed.