As the draeing shows, one microphone is located at the orgin, and a second microphone is located on the +y axis, its distances from microphones 1 and 2 being L1 and L2, respectively. The speed of sound is 343m/s. The sound reaches microphone 1 first, and then, 1.28 ms later, it reaches microphone 2. find the distance (in m) (a) L1 and (b) L2.