A data acquisition system is used to record data at a sampling frequency of 7.2 Hz. The system has an anti-aliasing filter that removes all frequencies above 6.4 Hz. The discrete- time signal is reconstructed resulting in a continuous time signal of y(t) = cos(2*pi*4.8*t). Is it possible the original signal was aliased? If so, can you determine the original frequency? • If the original signal is guaranteed not to be aliased, enter the frequency of the original signal (in Hz). •If the signal was possibly aliased, but there is only one possibility for the original signal frequency (assuming aliasing occurred), enter the frequency of the original signal (in Hz). • If the signal was possibly aliased, but there are multiple possibilities for the original signal frequency, then enter "0".