A spider is located at the position (1,2) in a coordinate system, where the units on each axis are feet. An ant is located at the position (15,0) in the same coordinate system. Assume the location of the spider after t minutes is s(t) = (1 + 2t,2 + t) and the location of the ant after t minutes is a(t) = (15 2t,2t).

(d) Where is each bug located when the y-coordinate of the spider is twice as large as the y-coordinate of the ant?