Which of the following statements is false?

Group of answer choices

Each object of a class shares one copy of the class's instance variables.

Each class declaration is typically stored in a file having the same name as the class and ending with the $.$cs filename extension

Class, property and method names begin with an initial uppercase letter $($i$.$e$.,$ Pascal case$)$; variable names begin with an initial lowercase letter $($i$.$e$.,$ camel case$).$

A class has attributes, implemented as instance variables. Objects of the class carry these instance variables with them throughout their lifetimes.