1. header

public Gizmo getCheapestGizmoByMaker(String maker) 

2. identify: new or modified variables, constants, constructors, or methods

include: what(name) + brief purpose

- need a new variable to store price for each Gizmo : let's call it 'price'

- need a accessor method to return the value of variable 'price'

- this variable 'price' needs to be instantiated in the Constructor

3. describe: visibility, type(or return type), parameters, implementation.

- the variable 'price' is private and type double. 

  it is a instance variable in class Gizmo, to be instantiated in its constructor

- the accessor method is public and has return type double(same as 'price')

  no parameters necessary, just accesses and returns the value of 'price'

- constructor of class Gizmo needs to receive a double value as parameter, 

  which then can set the value of price.