An observer in frame S standing at the origin observes two flashes of colored light separated spatially by ?x = 2980 m. A blue flash occurs first, followed by a red flash 5 µs later. An observer in S' moving along the x axis at speed v relative to S also observes the flashes 5 µs apart and with a separation of 2980 m, but the red flash is observed first. Find the magnitude and direction of v.