Which step is first in changing the proofing language of an entire document?

Avariable definition defines the name of a variable that will be used in a program, as well as

Pp 4.1 design and implement a class called sphere that contains instance data that represents the sphere’s diameter. define the sphere constructor to accept and initialize the diameter and include getter and setter methods for the diameter. include methods that calculate and return the volume and surface area of the sphere (see pp 3.5 for the formulas). include a tostring method that returns a one-line description of the sphere. create a driver class called multisphere, whose main method instantiates and updates several sphere objects.

Which statistical function in a spreadsheet you to see how far each number varies, on average, from the average value of the list?