PLEASE HELP!!

I'm not sure how to solve these so if anyone can help please do.

The radius of the base of a cylinder is 10 centimeters, and its height is 20 centimeters. a cone is used to fill the cylinder with water. the radius of the cone's base is 5 centimeters, and its height is 10 centimeters.

The data represents the semester exam scores of 8 students in a math course. {51,91,46,30,36,50,73,80} what is the five-number summary?

Find the midpoint m of z1=(8+5i) and z2=(12+3i)