x[n) and yin are the input and output signals of a DSP systems. Determine which of the following properties (Linearity, Causality, Time Invariance, and Memory) are possessed by systems defined by the recurrence formulas (A) and (B) below A) y[n]- 3x[n] - 4x[n-1] B) yln) - 2yn-1] + x[n+2]