A pulse is moving toward the end of a spring with a speed of 80 cm/s. It is not known whether the end is a fixed end or a free end. The diagrams below show the shape of the pulse at t=0 s and at t=1 s. Is the end of the spring a free end or a fixed end? Explain. If there is not enough information, state so explicitly. Write your explanation on paper and support your explanation with a clear diagram. Then upload your answer to Canvas.