a.
>> g8=tf([700],[1 17 830 12000])
Transfer function:
700
----------------------------
s^3 + 17 s^2 + 830 s + 12000
>> step(g8)
b.
>> g9=tf([360],[1 12 824 3200])
Transfer function:
360
---------------------------
s^3 + 12 s^2 + 824 s + 3200
>> step(g9)