i need help with likelihood ratio test please

Let X1, . . . , Xn be a random sample from an exponential distribution with the density function f (x|θ) = θ exp(−θx). Derive a likelihood ratio test of H0 : θ = θ0 versus HA : θ ̸= θ0, and show that the rejection region is of the form {X ̄ exp[−θ0X ̄] ≤ c}