The file series. txt contains an array of data with 4 columns (c1 to c4). er # rmoni uenc magnitude (volts phase (radians) 0.912 1.769 1.2 12.434 10.775 read this file into matlab using the load command. the data will be stored in a 2d array create a time vector t = 0: 0.01: 3 seconds write matlab code to perform the summation displayed below. this summation reconstructs a periodic signal from its compact fourier series coefficients, where cy refers to the ith row and jh column of the series data, and n is the number of harmonics to include in the summation. start with n-2 repeat the previous step for n-5, 10, 20, 30. submit a plot of the resulting signal for each of the studied values of n .answer the following questions (a) what type of physiological signal does this represent? (b) what is the effect of increasing the value of n? (c) how many coefficients are needed to get an accurate signal (subjective measure)? (d) what is the fundamental angular frequency?