I need the answer as soon as possible

Tow audio signals, each 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). Communication test I hope your solution is correct please MI(1) 1 (1) 15kHz (3) M2(1) 2 cosw It f1-40KHZ FM Modulator O/P 1 f 15kHz Carrier 90 MHZ B-5 (2) BW=1.79 MHz, Modulation index=18 O BW=1.77 MHz, Modulation index=16 O BW=1.76 MHz, Modulation index=15 O BW=1.74 MHz, Modulation index=13 O BW=1.75 MHz, Modulation index=14 O BW=1.78 MHz, Modulation index=17 O