Extracted text: 1. Using the arc and time conversion table, perform the following conversions: a. Express in arc measure a difference in longitude of 2"39"44", 8'42"29", 14'52m12", 20'40"35', and 23'09"10". b. Express in time measure a difference in longitude of 5°15'18", 13°38'35", 120°08'20", 145°52'10", and 179 58'16". Check your answers by a calculator.