An image of a rectangular prism is shown below:

A rectangular prism is shown.

Part A: A cross section of the prism is cut with a plane parallel to the base. What is the name of the shape created by the cross-section? Explain your answer. (5 points)

Part B: If a cross section of the prism is cut diagonal to the base, what would be the shape of the resulting cross section? Explain your answer. (5 points)