5.16, 5.18 and 5.19 (page.127)

4. The function f(t)=5sin(10nt)+3cos(40nt) is sampled at 30 samples per second.

What alias frequencies would you expect in the output?

If the waveforms in the function above are sampled at 5 samples/sec, what alias

frequencies would you expect in the discreet data?

What would be the minimum sampling rate to avoid aliasing for this function?