Laboratory compaction test results on a clayey soil are listed in the table.

Moisture content (%)	Dry unit weight (kN/m3)
6	14.80
8	17.45
9	18.52
11	18.9
12	18.5
14	16.9

Following are the results of a field unit weight determination test on the same soil with the sand cone method:

• Calibrated dry density of Ottawa sand = 1570 kg/m3

• Calibrated mass of Ottawa sand to fill the cone = 0.545 kg

• Mass of jar + cone + sand (before use) = 7.59 k

• Mass of jar + cone + sand (after use) = 4.78 kg

• Mass of moist soil from hole = 3.007 kg

• Moisture content of moist soil = 10.2%

Determine

a. Dry unit weight of compaction in the field

b. Relative compaction in the field