(2) Tow audio signals, cach covering the range 0 to 15 kHz, are to be combined and transmitted via FM as shown in figure below. for this system: - If the amplitude of the signal at point (3) is increased by a factor of three, find the bandwidth and modulation index at point (4). MIT) (1) X - 15kHz M20 2 coswlt 40KHZ OP (3) FM Modulator Carrier 90 MHZ (2) B5 15kHz BW-1.76 MHz. Modulation index=15 O BW=1.74 MHz, Modulation index=13 BW=1.78 MHz, Modulation index=17 O BW=1.75 MHz, Modulation index=14 O , = BW=1.79 MHz, Modulation index=18 O BW=1.77 MHz, Modulation index=16