Consider the sequence x(n)=(23)nu(n) (a) Find the numerical value of A=n=x(n) (b) Compute the power in x(n). P=n=x2(n) (c) If x(n) is input to a time-varying system defined by y(n)=nx(n). find the power in the output signal (i.e., evaluate the sum) P=n=y2(n)