Calculate the Energy of Activation of a First Order Reaction

Calculate the energy of activation of a first order reaction, if the rate constants are k ₁ = 4.9×10 ^{- 4} L/mol × s for T ₁ = 400 K and k ₂ = 0.18 L/mol × s for T ₂ = 500 K and R = 8.314 J/mol × K.

A) 5.5×10⁴ J/mol
B) 9.8×10⁴ J/mol
C) - 9.8×10⁴ J/mol
D) 2.78×10⁷ J/mol
E) - 5.5×10⁴ J/mol