Need help on 9-12, would be nice if a brief explanation is included for each

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.

7is b8 is d9 is c10 is a11 is d