The number of houses sold by an estate agent follows a Poisson distribution, with a mean of 2 per week. Then, the estate agent need to provide a report for every month to monitor sales in periods of 4 weeks. (a) Find the mean and standard deviation of X, for the number of houses sold by an estate agent in periods of 4 weeks. [CO2-PO2:C3] (4 marks) (b) Find the probability that in 4 weeks the estate agent sells more than 5