Demonstrate in an exercise, invented by you. Why the inverse kinematics of a spherical wrist manipulator cannot be solved by algebraic or geometric method. Please, make the drawing ofthe manipulator, or place the image of the one you used as a reference; likewise, include the corresponding calculations, according to the measures you have decided to use for the example. If you think there is an example of a manipulator that is easier to prove, than a spherical wrist manipulator, feel free to use it as an example. Respecting the specifications of the previous paragraph