With this information

•icao identifier: kelp

•field elevation: 3961 feet

•weather: winds 230 at 7 knots, visibility is 10 statue miles, few clouds at 13,000ft, broken at 18,000ft, broken at 25,000ft, tempreture 31 dew point 10, altimiter 3018

*061551z 23007kt 10sm few130 bkn180 bkn250 31/10 a3018
find the

1. pressure altitude (pa)

2. pressure ratio (delta)

3. temperature ratio (theta)

4. density ratio (sigma)

5. density altitude (da; no humidity considered)

6. density altitude with 100% relative humidity