Consider the graph of Gibbs free energy \( G \) vs Extent of reaction. The number of statements from the following which are true with respect to points \( (a) \), \( (b) \) and \( (c) \) is __________,
\((1)\) Reaction is spontaneous at \( (a) \) and \( (b) \)
\((2)\) Reaction is at equilibrium at point \( (b) \) and non-spontaneous at point \( (c) \)
\((3)\) Reaction is spontaneous at \( (a) \) and non-spontaneous at \( (c) \)
\((4)\) Reaction is non-spontaneous at \( (a) \) and \( (b) \)
