Calculate the sampling frequency and save this in a variable called fsq$4$

$2.$ Calculate the Nyquist frequency fNy and save this in a variable called fnyq$4.$

$3.$ Plot the spectrum of this data. Limit the frequency range of the plot to $0<=$ f $<=$ fNy

$4.$ Identify the primary frequency of this spectrum $($the frequency with the largest amplitude$).$ Put this value in a

variable called fmaxq$4.$