Which of the following statements is true about class attributes? Check all that are true.

the values of an object's attributes are called the state of that object

attributes can be any kind of Python data types

all of a class's attributes are defined by its constructor method

attributes names must start with an upper or lower case letter

object attributes can be read or updated by using "dot notation" $-$ for example, for an object s$1$

s$1.$name $=$ 'Mary' resets object s$1\text{'}$s name to "Mary"

attributes belonging to an object are referenced by methods inside the class by using a common keyword prefix, customarily "self"