BelAir Tech has a five-member team in charge of development and maintenance of its information systems. An information system is in place, and the team performs routine maintenance to keep it running smoothly. Which of the following scenarios is an example of adaptive maintenance? a. Jason notices a faulty component in the system and modifies the component. b. Sara knows that the company is migrating to a new operating environment in the next month, and makes the appropriate changes to the system. c. Justin works on the system to make the user interface more user-friendly. d. Kiera detects a fault in the coding, which is hampering system performance, and rectifies it. e. Dylan predicts that the company's old system may fail under new demands, and takes steps to avert this.

Thomas kratzer is the purchasing manager for the headquarters of a large insurance company chain with a central inventory operation. thomas's fastest-moving inventory item has a demand of 6,000 units per year. the cost of each unit is $100, and the inventory carrying cost is $10 per unit per year. the average ordering cost is $30 per order. it takes about 5 days for an order to arrive, and the demand for 1 week is 120 units. (this is a corporate operation, and the are 250 working days per year.)a) what is the eoq? b) what is the average inventory if the eoq is used? c) what is the optimal number of orders per year? d) what is the optimal number of days in between any two orders? e) what is the annual cost of ordering and holding inventory? f) what is the total annual inventory cost, including cost of the 6,000 units?