Q1. For each of the following signals:

1. x(k) = tan(0.707 pi k) [(k) (k 100)]
2. x(k) = (k) + cos( pi k) (1)^k
3. x(k) = sin( 0.5 pi k)/(1+ k²)
4. x(k) = j^2k
5. x(k) = k²/(1 + k²)

1. Classify each of the following signals as bounded or unbounded.
2. Classify each of the following signals as periodic or aperiodic.
3. Classify each of the following signals as finite or infinite. For the finite signals, find the smallest integer N such that x(k) = 0 for |k| > N.
4. Classify each of the following signals as causal or noncausal.