Block diagram of a receiver is shown in the figure:(a) Identify 'X' and 'Y'(b) Write their functions.

From the given block diagram of demodulation of a typical receiver, we can conclude the following things;(a) X represents Intermediate Frequency (IF) stage while Y represent an Amplifier,(b)At IF stage, the carrier frequency is transformed to a lower frequency then in this process, the modulated signal is detected. The function to amplifier is to enough to be made use of and hence is essential.