Consider the following statements regarding a linear discrete-time system

H(z) =	z² + 1
	(z + 0.5)(z - 0.5)

1. The system is stable.
2. The initial value h(0) of the impulse response is – 4.
3. The steady-state output is zero for a sinusoidal discrete-time input of frequency equal to onefourth the sampling frequency? Which of these statements are correct? \