38. A circuit that filters out a certain fre- quency is shown in the figure. In this fil- ter, the ratio of the magnitudes of the o voltages is given by: Vi Vo where w2, and /is the frequency of the input signal. where Zrf, and,fis the frequency of the input signal Write a user-defined MATLAB function that calculates the ratio of magnitudes. For the function name and arguments, use RV-filt a freq (R, C, L, f). The input arguments are R the size of the resistor in (ohms); C, the size of the capacitor in F (farad); L, the inductance of the coil in H (henrys); and f, the frequency of the input signal in Hz (hertz). Write the function such that f can be a vector Write a program in a script file that uses the filtafreq function to generate a figure with two plots of RV as a function of ffor 10s f 3100,000 Hz. In one plot C = 160 F, L = 45 mH, and R = 200 and in the sec- ond plot C and L are unchanged but R-50 . The plot has a logarithmic scale on the horizontal axis. Label the axes and display a legend