Define the following methods:

findBaseArea$()$ has one double parameter as a cylinder's radius. The method returns the area of the cylinder's base as a double. The area of the base is calculated by:

findVolume$()$ has two double parameters as a cylinder's radius and height. The method returns the cylinder's volume as a double, and uses the findBaseArea$()$ method to calculate the cylinder's base area. The volume is calculated by: