% Student exercise 4

clear;
clc;
num=5;
den=[1 8 325];
G=tf(num,den);
bode(G)
grid on
zeta=8/(2*sqrt(325))
sqrt(325)
wr=sqrt(325)*sqrt(1-2*(zeta)^2)
w=18
[mag,phase]=bode(G,w)
mag*1.5

%