A maxim is simply a moral rule or principle, which can be considered objective or subjective, and dependent on one's philosophy. In Lesson 3, we learned the Kant maxim which refer to check whether a "moral rule" statement morally right or wrong using the Kantianism formulation.
(Hint: please refer to the slides of Lesson 3 for more information about the Kant maxim and Kantianism formulation, which will help you with the following questions.)
Write down one morally right (or good) maxim, with the 1st formulation of Kantianism to show why it is right.