As the drawing shows, one microphone is located at the origin, and a second microphone is located on the +y axis. The microphones are separated by a distance of D = 1.72 m. A source of sound is located on the +x axis, its distances from microphones 1 and 2 being L1 and L2, respectively. The speed of sound is 345 m/s. The sound reaches microphone 1 first, and then, 1.21 ms later, it reaches microphone 2. Find the distances (in m) (a) L1 and (b) L2.
