Identify the type of motion in the following robots.

1. Straight line movement of a robot.
   Motion type ……………
2. Robot spinning around a fixed axis.
   Motion type ……………
3. The motion of planets in solar system as they revolve around the sun.
   Motion type ……………
4. Turning a steering wheel.
   Motion type ……………

Observe the two robots, identify the types of links and joints they have, and mention the same in the below-given table.

Name the types of joints in the given figure.

What would be the degrees of freedom of the following robotic arm?