please solve a and b and show graph

EtOH (wt%) 0 10 20 30 40 D20 0.9980 0.9836 0.9704 0.9556 0.9369 0.9155 0.8927 0.8692 0.8451 0.8194 0.7907 50 60 70 80 90 100 Here, D2 is the specific gravity of the solution at 20C with respect to water at 4C. a) Calculate the volume change. AVmix, when pure water and pure ethanol are mixed at 20C to form a solution that contains 20% ethanol by mol. Report in cm/mol of solution. b) Make a graph of AVmix (in cm/mol of solution) as a function of the mol fraction of ethanol in the range 0 to 100%. The graph must be generated on the computer. It should be fully annotated and must contain no hand-written labels