Using MATLAB

Consider the $3-$phase excitation:

$v_a=$Acos$(t)V,v_b=$Acos$(t-\frac{2}{3})V,v_C=$Acos$(t+\frac{2}{3})v$

Generate a plot that shows $3$ curves representing $v_a,v_b,$ and $v_c$ as functions of time $(t),$ where $t$ is defined on the interval $0,4T,$ and $T=\frac{2}{}.$ Use a time steps of size $t=\frac{T}{N-1},$ with the $N=40.$ Assume that $A=2V,$ and $=60ra\frac{d}{s}.$ Format your plot as follows:

label the $x$ axis with "Time $($s$)"$ and the y axis with "Voltage $($V$)".$

Add the title $"3-$Phase Excitation".

Add a legend with the labels "Phase a$",$ "Phase b$",$ and "Phase c$",$ for the phase voltages $v_a,v_b,$ and $v_c,$ respectively.