4. Two waves on the surface of water are generated by two independent sources vibrating at the same frequency 4.0 Hz. The waves travel at a speed of 3.2 m/s. A point P is located 4.2 m from source 1 and 4.6 m from source 2. a. What is the wavelength of the waves? b. What is the extra distance traveled by the second wave before it reaches point P? c. What is the result of the interference at the point P? d. What will be the result of interference at the point P if source 2 is moved 1.2 m further back? e. What will be the result of interference at the point P if source 2 is moved an additional 1.6 m further back