The laboratory results of a compaction test were: maximum dry unit weight 18.08 kN/m³ and optimal moisture content 12.27%. If in the field a dry unit weight measurement of 16.2 kN/m³ was given.
a. Determine the relative compaction of the soil.
b. Yes, the soil in the field has a moisture content of 15% and a specific gravity of 2.70. What is the maximum possible relative compaction that can be achieved without making changes to the moisture content of 15%?