Suppose we want to transmit the message 11101011 and protect it from errors using the crc polynomial x3 +1. a) use polynomial long division to determine the message that should be transmitted. b) suppose the leftmost bit (most significant bit) of the message is inverted due to noise on the transmission link. what is the result of the receiver’s crc calculation? how does the receiver know that an error has occurred?

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.