Two loudspeakers emit sound waves of wavelength 2.2 rn. Speaker 2 is 1.5 m behind speaker 1, and the inherent phase difference between the speakers is 7: 3 rad. What is the phase difference of the sound wave at a point 3.00 m in front of speaker 1? O 3.1 rad O 9.6 rad O 5.3 rad O 1.05 rad O 4.0 rad