Which two-dimensional shape could be created by a plane slicing horizontally through this pyramid?

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

True or false? a circle could be circumscribed about the quadrilateral below.

Ineed me i stuck and i don’t want to get it wrong