Which option identifies how Kevin should proceed in the following scenario? Four years ago Kevin designed an MP3 player for young children. Now that technology has changed, he would like to update his design to ensure that it encompasses cutting-edge techniques.

by designing an isometric projection of his new ideas

by creating a third-angle projection of his ideas

by referring to past designs and illustrations of his original model

by conferring with engineers who have improved upon similar devices

An air-conditioning system consists of a heating section and an evaporative cooler. air enters the heating section at 10°c and 70 percent relative humidity at a rate of 30m^3/min, and it leaves the evaporative cooler at 20°c and 60 percent relatively humidity. if the air conditioning system operates at a total pressure of 98 kpa, determine (a) the temperature and relative humidity of the air when it leaves the heating section, (b) the rate of heat transfer in the heating section, and (c) the rate of water added to air in the evaporative cooler