You are given the following echo cancellation system model as $,$ where is the output of the echo cancellation, is a signal with an echo, is the attenuation of the echo, and is the time delay of the echo in samples. Assume that the delay given corresponds to a sampling frequency such that it is possible to perfectly remove the echo. We want to construct vectors A and B$,$ to define the feedback and feedforward coefficients, respectively. Which of the following is the correct syntax to construct vector for A$,$ the feedback coefficients, and B$,$ the feedforward coefficients?

Group of answer choices

A$=[1$ zeros$(1,389)0\mathrm{.}6]$; B$=0\mathrm{.}6$

A$=[1$ zeros$(1,389)0\mathrm{.}6]$; B$=1$

A$=[1$ zeros$(1,389),0\mathrm{.}6]$; B$=[1$ zeros$(1,389),0\mathrm{.}6]$

A$=1$; B$=[1$ zeros$(1,389)0\mathrm{.}6]$