Based on their activation energies and energy changes and assuming that all collision factors are the same,

Question:

Based on their activation energies and energy changes and assuming that all collision factors are the same, which of the following reactions would be fastest and which would be slowest? Explain your answer.
(a) Ea = 45 kJ mol; (E = -25 kJ/mol
(b) Ea = 35 kJ mol; (E = -10 kJ/mol
(c) Ea = 55 kJ mol; (E = 10 kJ/mol?