the following questions for the scenario: an object is located 30.0cm in front of a diverging lens with a focal length of 20.5cm. a) what is the image distance? b) assume the object is brought to a distance of 7.70cm in front of the lens, where is the image now with respect to the previous location? (hint: make sure that the sign convention you use is consistent in treating all image distances on the object side of the lens as negative)? d) how has the height of the image changed if the object is 91.60cm tall