Asignal m1(t) is band-limited to 3.6khz, and three other signals – m2(t), m3(t) and m4(t) are band-limited to 1.2khz each. these signals are to be transmitted by means of time division multiplexing. the scheme below shows how the multiplexing requirement may be accomplished.

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature