Please answer #4 with solution.
Extracted text: 4. The sum of the positive departure exceeds that of the negative departures by 0.31 m. The sum of negative latitudes exceeds that of the positive latitudes by 1.67 m. Determine the corrected latitude of 48.12 m line whose latitude is 21.09 m. The sum of the sides is measured to be 292.52 m. 5. A closed traverse has the following data. LINE 1-2 2-3 LATITUDE +76.30 +33.80 DEPARTURE +43.18 3-4 4-5 -16.39 +64.12 -73.87 -80.58 -31.93 +10.72 5-6 6-1 +40.22