Given the points A, B, C, and D. B is the midpoint of AC and C is the midpoint of AD. If the coordinates of point A and point D are (-5, 9) and (7, 1) respectively, find the coordinates of points B and C.

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?