Karla is drawing a portrait of her sister. Karla wants to make sure she draws the face with the right proportions. In reality, her sister’s eyes are 1.2 inches apart (from pupil to pupil) and her mouth is 1.8 inches above the bottom of her chin. Karla has already drawn her sister’s eyes 0.4 inches apart on the paper. How far above the bottom of the chin must Karla draw her mouth?