Write a class, Birthyear, which calculates the birthyear from this year and a persons age.
Point out the declaration equations and the normal equations.
Write an instance of the class Birthyear above. The class, let's call it MartinsBirthyear, shall calculate the Martin's birthyear, call the variable martinsBirthyear, who is a 29-year-old. Point out the modification equation.
Check your answer by writing as below: