As shown in the gure, a speaker (sound source) is located at the origin, one pickup microphone is located a distance DI away and along the positive y-axis and a second pickup microphone is located a distance D = 1.97 m to the right of the first microphone at a distance DZ from the speaker. If a sound from the speaker reaches the second microphone 1.34 ms after it reaches the first microphone and the speed of sound is 343 m/s, determine the distances 01 and Dz to the two microphones. 4.111 x D = 1 How is the distance to microphone #1 related to the speed of sound and its time of travel to the microphone? m D2: [Tl microphone 1 microphone 2 .2\" \\speaker (sound source) Two trains approach each other on separate but adjacent tracks. Train 1 is traveling at a speed of 34.9 m/s and train 2 at a speed of 28.6 m/s. If the engineer of train 1 sounds his horn which has a frequency of 520 Hz, determine the frequency of the sound heard by the engineer of train 2. (Use 343 m/s as the speed of sound. Enter your answer to the nearest H2.) H2