Answer parts a, b, and c

where x1[n] and x2[n] denote input signals. (a) Determine the input-output relationship for system S. (b) Does the input-output relationship of system S change if the order in which S1 and S2 are connected in series is reversed (i.e., if S2 follows S1 )? 16. Consider a discrete-time system with input x[n] and output y[n]. The input-output relationship for this system is y[n]=x[n]x[n2]. (a) Is the system memoryless? (b) Determine the output of the system when the input is A[n], where A is any real or complex number. (c) Is the system invertible