A Valentine's Day Message Suppose you want to create a picture of a heart on your computer for a Valentine's Day message. Write a polar equation you could use to generate the heart shape, making sure the graph of the equation is an upright heart. (Hint: The heart-like shape of the cardioid curve is the reason for its name- from the greek word for "heart.") Be sure to write your equation and draw its graph. (10 points)