Obtain the steady-state response, if any, of the following models for the given input. If it is not possible to determine the response, state the reason.
a. Y(s)/F(s) = 6/(7s + 3)............................f(t) 14us (t)
b. Y(s)/F(s) = (7s - 3)/(10s2+6s+9)................f(t) = 5us(t)
c. Y(s)/F(s) = (3s + 5)/(s2 -9) .....................f(t) = 12us(t)
d. Y(s)/F(s) = (4s + 3)/(s2+2s-7)...................f(t) = 8us(t)