A shell is shot with an initial velocity v Overscript right-arrow EndScripts Subscript 0 of 12 m/s, at an angle of θ0 = 53° with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass (see the figure). One fragment, whose speed immediately after the explosion is zero, falls vertically. How far from the gun does the other fragment land, assuming that the terrain is level and that air drag is negligible?