hello everyone, I have an exam question about sampling frequency. Actually i really don't get the concept. I have limited sources. Question: Bandwith of x(t) 10 kHz y(t) obtained modulating x(t) with a sinus wave with frequency 30 kHz. y(t) sampled a) What is the sampling frequency of y(t) ? b) z(t)=y(t)+s(t) -> bandwith of s(t) = 40 kHz, what is the sampling frequency of z(t) ? Could you help me to find a solution ?