Explain the basis for ideal behavior for acetone

Question

The partial pressures for acetone and diethyl ether above the solution with X_E = 0.80 and P_E = 0.713 bar and P_A = 0.120 bar. Assume Raoult's law defines ideal behavior for both diethyl ether and acetone.
1. Determine the a_E and a_A activities of acetone and diethylether for the above solution?
2. Determine the γ_E and γ_A activity coefficients for acetone and diethyl ether for the above solution?

3. At T =30^oC is K_A = 0.784 bar the Henry's law constant for acetone in diethyl ether. Using Henry's law as the basis for ideal behavior for acetone, for a_A andγ_A.