Two identical speakers are set some distance apart in a large open field. Both are producing sound, in unison, with a wavelength of 4 m. An observer wandering around the field notices that the sound is surprisingly loud at certain locations and unusually quiet at others. The observer concludes that this is the effect of interference between the two sources of sound waves. For each location, indicate which sort of interference would occur at that point. 1. Constructive interference
2. Destructive interference
3. In between interference

a. 16 m from one speaker and 24 m from the other
b. 13 m from one speaker and 19 m from the other
c. 11 m from one speaker and 7 m from the other
d. 12 m from one speaker and 14 m from the other
e. 16 m from one speaker and 13 m from the other
f. 20 m from each speaker
g. 19 m from one speaker and 14 m from the other