please answer parts a-d step by step

2. Seawater T,S and density. A water mass parcel starts with a salinity of 30 psu, and a potential density 0 of 24kgm3. Based on the T-S diagram at the end of the homework (Figure 2), answer the following: (a) What is the approximate temperature of the water parcel? (1 point) (b) The sun warms up the water parcel by approximately 20C. What is the new potential density of the parcel? (1 point) (c) Evaporation adds about 4g/kg of salt to the water parcel. What is the new potential density? (1 point) (d) What would happen to the actual density of the water parcel if it was moved from the surface to 3000m depth? (A qualitative answer is sufficient) And what would happen to the potential density of the parcel? ( 2 points) Figure 2. T-S diagram for seawater at the surface ( 0m depth, 1Atm pressure). The contours and numbers show potential density O in kg