What is your observation? a. The PM signal can still be received since kp does not influence the PM index. b. kp is too high, therefore PM modulation will overlap sampling times and the message will be lost. c. kp is very small, therefore the PM index is very small, and changes in the message wave will be difficult to detect in the PM signal. This will require a highly sensitive receiver capable of detecting small phase changes. d. All statements are incorrect.

AM modulation Message 10 0 0 -5 -5 -10 0 tirne 10 ime 10 combined message and PM signal combined message and FM signal 10 10 10 10 -10 -10 -10 -10 0 tirne 10 ime 10