The lens shown has radii 24.8 cm and 14.4 cm and is made of a material with index of refraction 1.48. Using the shape of the lens to assign the given radii, calculate the focal length of the lens. Consider the case where 24.8 cm is the left side and 14.4 cm the right side. (What would you get if you reversed the order, ie. flipped the lens so the two sides are switched?)