One beam, then four peaks. Not for sale yet.
Shear and moment
Pin on the left, roller on the right. Point loads point down. Shear jumps by each force. Moment is the area under that shear, and it ends at zero.
That's the four.
Distributed loads are coming. Not for sale yet.
Mechanics Map, section 6.4, shear and moment diagrams. CC BY-SA 4.0. This page links that chapter and does not copy it. The drawing is original.