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8. The transfer function of a system describes its dynamic characteristics, then which of the following factors does it relate to? ( ) A. Input signal B. Initial conditions C. System parameters D. Input signal and Initial conditions 9. The transfer function of a second order system is G(s) = C. 2.5 undamped Natural frequency of this system. ( A. 10 B. 5 D. 25 closed-loop transfer function T(s) given by 10. A system has the 2500 . Using the notion of dominant poles, estimate the expected T(s)=- percent overshoot. ( ) A. 0% 5% B. 0% 20% (s+20)(s² +10s +125) 3 4s² + s +100 C. 6% 50% ) please calculate the D. No overshoot expected 11. Which index reflects the stability of a second order system? ( ) A. ζ B. t C. t, D. e 12. In the following differential equations, the linear stationary system is represented by ( ) A. 4ÿ(t) + 3y² (t) + y(t) = u(t) B. 4ÿ(t) + 3y(t) + y(t) = u(t) C. 42(t) + 3y(t) + 2y(t) = u(t) D. 4ÿ(t) + 3e¹y(t) + 2ln(t)y(t) = u(t)