Question y 2 pts A Gamma distribution can be used to model the arrivals of trains into a station. What is the mean expected value) of the time in minutes required for 4 trains to arrive if the average time between train arrivals is 11 minutes? Report in minutes with no decimal places. Question 10 1.5 pts A Gamma distribution can be used to model the arrivals of trains into a station. What is the variance of the time in minutes required for 5 trains to arrive if the average time between train arrivals is 12 minutes? (Note: values may differ from previous question.) Report in minutes with no decimal places. Question 11 1.5 pts Arrivals of patrons at a restroom can be modeled with a Poisson process that has 50 arrivals per hour. You want to model the time between arrivals using the exponential distribution. What value would you use for the parameter beta? Report as a decimal in HOURS to 2 decimal places