1. The problem statement, all variables and given/known data Hello, the plot in the image shows a modulated signal s(t), with one period of the modulating signal m(t). The mean value of m(t) is equal to zero . Its asked me to find the modulated index, the amplitude of the carrier, the equation of the message(m(t)) and the kind of modulation (DSB-SC or AM). 2. Relevant equations s(t)=A*m(t)*cos*2*pi*fc*t) (dsb-sc modulation) s(t)= (1+ka*m(t))*cos*2*pi*fc*t) (am modulation) 3. The attempt at a solution I don't know, I'm really stuck in this exercise.