Over million tweets are sent per day (digital marketing ramblings website, december 15, 2014). assume that the number of tweets per hour follows a poisson distribution and that bob receives on average tweets during his lunch hour. a. what is the probability that bob receives no tweets during his lunch hour (to 4 decimals)? 0.0009 b. what is the probability that bob receives at least tweets during his lunch hour (to 4 decimals)? for this question, if calculating the probability manually make sure to carry at least 4 decimal digits in your calculations. 0.5169 c. what is the expected number of tweets bob receives during the first minutes of his lunch hour (to 1 decimal)? d. what is the probability that bob receives no tweets during the first minutes of his lunch hour (to 4 decimals)?