The text below was taken from an abstract written to describe the results of an experiment. For each numbered and underlined group, identify, if any, the improperly formatted terms by providing the corresponding correctly formatted versions. An experiment was conducted to determine the heat transfer from a hot heat exchanger tube to air. The velocity of the air was set as . Its flow rate was (2) 525 liters/min. An optical pyrometer recorded the surface temperature of the tube, The temperature of the air was (5) 65% less.