x(t)=V[]I+km(t)]cos,t The block diagram in Figure 1 shows the process of demodulating the original information signal m(t) Figure 1: Demodulation Show the processes invloved in recovering m(t) from the square rooter output b(t). [12 mark]] (b) [5 marks] What is noise. Explain bow an FM wave has strong noise immunity than AM wave? [5 marks] (c) [8 marks] The input to an FM receiver has an signal to neise ratio (SN) of 2.8. The modulaking frequency is 1.5kHz. The maximum permitied deviation is 4kHz. What is; i. the frequency deviation caused by the notse ii. the improved outpat 5/N ? [8 marks] Total for Question 3: 2s Question 4 (a) [5 marks] Stute Carsow's signifcant bandwidth rule. [5 marks] (b) [5 marks] Conppere the majoe difference berween FM and PM. [5 mark] (c) [15 mark] Find the carrier, modulating frequency, modulating index and maximum deviation of the FM wave represented by the equation. CFM=12sin(6102t+5xin1250r) i. What power will the FM wave dissipate is a 100 resistance. ii. Using the table of bessel functions, find the amplitade of each significant sideband iii. Given that; p(t)=R12E22+E12+E22++En2] where E0 is the amplizude of the carrier and E1,E2,E0, are the amplitudes of the sidetands. a) Compute the total power P(t) B) Compare and comment on the results of P(t) with (i) above. [15 marks]