Two eagles fly directly toward one another, the first at 14.8 m/s and the second at 20.2 m/s. Both screech, the first emitting a frequency of 2590 Hz and the second a frequency of 3860 Hz. What frequency does the first receive if the speed of sound is 330 m/s?
a. 3720 Hz
b. 4300 Hz
c. 4690 Hz
d. 5280 Hz