Adesktop computer is to be cooled by a fan. the electronic components of the computer consume 60 w of power under full-load conditions. the computer is to operate in environments at temperatures up to 45°c and at elevations up to 3400 m where the average atmospheric pressure is 66.63 kpa. the exit temperature of air is not to exceed 60°c to meet the reliability requirements. also, the average velocity of air is not to exceed 110 m/min at the exit of the computer case where the fan is installed to keep the noise level down. determine the flow rate of the fan that needs to be installed and the diameter of the casing of the fan.