Select the true statement regarding amplitude modulation (am). a. an increase in message amplitude, am, results in a higher am index, µam. b. an increase in message amplitude, am, results in an increase in occupied frequency bandwidth. c. as the message frequency increases, the occupied frequency bandwidth decreases. d. over-modulation occurs when the carrier wave amplitude, ac, is greater than the message wave amplitude, am.

Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s