Allegheny bank has a branch at the local community college. the branch is the busiest at the beginning of the college year when freshman open accounts. this year, freshman arrived at the office at a rate of 3 every 12 minutes. on average, it takes the allegheny bank staff person about 2.5 minutes to process each account application. the bank is considering having one or two tellers. each teller is paid $15 per hour and the cost of waiting in line is assumed to be $19 per hour. a. what is the probability that 2 or less than 2 customers are in the line? b. what is the average time that a students waits before having a teller take care of their request? c. what is the system cost per hour with the single teller? d. if 2 tellers are now employed, what is the time in the system? e. what is the cost of the system based on 2 tellers? f. what is the cost savings or increase by adding a second teller?

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An allergy products superstore buys 6000 of their most popular model of air filters each year. the price of the air filters is $18. the cost of ordering and receiving shipments is $12 per order. accounting estimates annual carrying costs are 20% of the price. the supplier lead time is 2 days. the store operates 240 days per year. each order is received from the supplier in a single delivery. there are no quantity discounts. what is the store’s minimum total annual cost of placing orders & carrying inventory?

Problem 3: access control pokeygram, a cutting-edge new email start-up, is setting up building access for its employees. there are two types of employees: managers and engineers, and there are three departments: security, networking, and human resoures. each employee works in a single department, and each department is housed on a different floor. managers are allowed access to any floor, while engineers are allowed access only to their own floor. there are three badge-operated elevators, each going up to only one distinct floor. every employee has one badge. pokeygram wants to use the best possible access control method in order to minimize delay for the elevators (a) access control matrix, 1. which of the following would you recommend that pokeygram use: (b) access control lists, or (c) capabilities? make sure to justify your answer. 2. what, if any, would be the benefits (and/or disadvantages) of using rbac (role-based access control) in this situation? keep your solution for this problem limited to 10-12 lines of text.