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Draw below a Gallilean telescope (one built with a converging primary lens and a diverging eyepiece lens). Draw it to scale so that the overall angular magnification is $M = 10$. Derive its magnification in terms of $f_p$, $f_e$, and any other parameters you think necessary. Remember, $f_e$ is negative for a Gallilean telescope. Draw on the diagram the rays used to derive the magnfication (which are tricky for a diverging eyepiece, so be careful).