Can u guys pls help me on this question and pls explain how u got the answer

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

According to the data set, where should the upper quartile line of the box plot be placed?

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.