A discrete-time processor uses a sampling interval T = 0.5 μs. What is the highest frequency of a signal that can be processed with this processor without aliasing? If a signal of frequency 2 MHz is...

A discrete-time processor uses a sampling interval T = 0.5 μs. What is the highest frequency of a signal that can be processed with this processor without aliasing? If a signal of frequency 2 MHz is sampled by this processor, what is the (aliased) frequency of the resulting sampled signal?