A company is in the business of finding addresses of longlost friends. The company claims to have a 80% success rate. Suppose that you have the names of seven friends for whom you have no addresses and decide to use the company to track them. (a) Make a histogram showing the probability of r= O to 7 friends for whom an address will be found. (b) Find the mean and standard deviation of this probability distribution. (Round your answers to two decimal places.) )4. = __ friends 0' = __ friends What is the expected number of friends for whom addresses will be found? (Round your answer to two decimal places.) _ friends