Part A A photographer uses his camera, whose lens has a

$50$ mm

focal length, to focus on an object

$2\mathrm{.}0$ m

away. He then wants to take a picture of an object that is

$60$ cm

away. In which direction must the lens move to focus on this second object? toward the film away from the film Part B How far must the lens move to focus on this second object? Express your answer to two significant figures and include the appropriate units. $\backslash [\backslash$Delta x$=\backslash ]$