What is the energy sequence of the signal ax(n)+by(n-l) in terms of cross correlation and auto correlation sequences?

a 2 r xx (0)+b 2 r yy (0)-2abr xy (1)

What is the energy sequence of the signal ax(n)+by(n-l) in terms of cr

1.	What is the energy sequence of the signal ax(n)+by(n-l) in terms of cross correlation and auto correlation sequences?
A.	a<sup>2</sup>r<sub>xx</sub>(0)+b<sup>2</sup>r<sub>yy</sub>(0)+2abr<sub>xy</sub>(0)
B.	a<sup>2</sup>r<sub>xx</sub>(0)+b<sup>2</sup>r<sub>yy</sub>(0)-2abr<sub>xy</sub>(0)
C.	a<sup>2</sup>r<sub>xx</sub>(0)+b<sup>2</sup>r<sub>yy</sub>(0)+2abr<sub>xy</sub>(1)
D.	a<sup>2</sup>r<sub>xx</sub>(0)+b<sup>2</sup>r<sub>yy</sub>(0)-2abr<sub>xy</sub>(1)
Answer» D. a<sup>2</sup>r<sub>xx</sub>(0)+b<sup>2</sup>r<sub>yy</sub>(0)-2abr<sub>xy</sub>(1)