From his hotel room window on the fourth floor, Ranjan notices some window washers high above him on the hotel across the street. Curious as to their height above ground, he quickly estimates the buildings are 60 m apart, the angle of elevation to the workers is about 600 , and the angle of depression to the base of the hotel is about 300 . (i) How high above ground is the window of Ranjan’s hotel room? (ii) How high above ground are the workers?