Assuming zero initial condition, the response y(t) of the

Assuming zero initial condition, the response y(t) of the system given below to a unit step input u(t) is

	y(s)	=	1
	u(s)		s

y(s) =	1	× u(s)
	s

For unit step 1 / s

u(s) =	1
	s

y(s) =	1
	s²

y(t) = t u(t)

	t²	u(t)
	2