Find the inverse Laplace transforms
(L^(-1))
of the following: (a)
e^(-s)*(1)/(s^(2))
(b)
e^(-2s)*(s)/(s^(2)-1)
. (c)
e^(-3s)*(s)/(s^(2)(s^(2)+9))
. (d)
e^(-s)*(s)/((s+1)^(2)+1)
.