3. a. the city of cary is holding a special census. the city has collected data on cards that each hold the voting district and age of a citizen. the districts are numbered 1 through 22, and residents' ages range from 0 through 105. design a program that allows a clerk to go through the cards, entering the district for each citizen until an appropriate sentinel value is entered. the output is a list of all 22 districts and the number of residents in each.

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.