Elbow, a hinge joint.
Synarthrotic-These joints are "fiberous" and don't move a lot.Skeletal sutureAmphiarthrotic-This joint only permits slight movement. RibsDiarthrotic-Freely moveing joint.
the elbow, knee, between the metacarpals and metatarsal bones, fingers (where the flexon creases are)
Yes, it is a ball and socket synovial joint.
multiaxial joint