Assuming that the cone is completely filled with ice cream, which of the following equations below could be used to calculate the total volume of ice cream in the cone (before you start eating it!)?

On top of the cone is 18 as the bottom is 26.

A.V=π(9)^2(26)+(4/3)π(9)^3

B.V=(1/3)π(18)^2(26)+(2/3)π(18)^3

C.V=(1/3)π(9)^2(26)+(2/3)π(9)^3

D.V=(4/3)π(9)^2(26)+(1/3)π(9)^3

Plz help ;-; I would be helpful if you explain it ti me in steps ^^;

Is the top of the ice-cream a hemisphere?

"On top of the cone is 18 as the bottom is 26. "

This makes no sense to me.
I need the radius of the cone, and the height of the cone. (The radius of the hemisphere is determined by the radius of the cone)