A lighthouse stands 425 m off a straight shore and the Lighthouse focused beam of its light revolves four times each minute. As shown in the figure, P is the point on shore closest to the T lighthouse and Q is a point on the shore 200 m from P. What is the speed of the beam along the shore when it strikes the b point Q7 l 0 P e 200 m ] Let x be the distance along the shore from point P to the beam and let O be the angle through which the light revolves. Write an equation that relates x and 0. Find the related rates equation. dx dd a-(Dx When the beam strikes the point Q, its speed along the shore is about |:| I:I (Do not round until the final answer. Then round to the nearest integer as needed.)