Lets add an echo to the signal with a delay of to = 0.12 seconds and an amplitude of α = 0.8. what is the delay n in samples? based on the difference equation, create an echo version of the signal x using the command y = conv(h, x); . what is h? listen to the output of the difference equation. do you hear the echo? 5. remove the echo. the difference equation above for modeling the echo is an lti system. to remove the echo, we need to implement the inverse system. whaterse system? what is the duration of this impulse response? 6. for the echo parameters you used above, plot the impulse response of the inverse system. make the horizontal axis in your plot in units of seconds. 7. implement the inverse of the echo system to perform

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α.part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part bsuppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i. e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part cnow try a numerical problem. what is the direction of the vector w = < -1, 6 > ?