Find the required probabilities using the exponential density function f(t) = 1 e−t/, [0, ∞). The waiting time t (in minutes) for service at the checkout at a grocery store is exponentially distributed with = 2. Find the probabilities of waiting less than 3 minutes, more than 3 minutes but less than 5 minutes, and at least 3 minutes. (Round your answers to three decimal places.)