Sean just graduated from college and is now in the market for a new car. He has saved up to $4,000 for a down payment. He's deciding between a Super and a Duper. The Super is priced at $23,599 and the Duper is priced at $18,999. After agonizing over the decision, he decides to buy the Duper. He writes a dealership check for $4,000 and takes out a loan for the remainder of the purchase price. Identify what role money plays in each of the following parts of the story. (Medium of exchange, unit of account, or store of value)
A. Sean writes a check for $4,000.
B. Sean can easily determine that the price of the Super is more than the price of the Duper.
C. Sean has saved $4,000 in his checking account.

Aproduction line has three machines a, b, and c, with reliabilities of .96, .86, and .85, respectively. the machines are arranged so that if one breaks down, the others must shut down. engineers are weighing two alternative designs for increasing the line’s reliability. plan 1 involves adding an identical backup line, and plan 2 involves providing a backup for each machine. in either case, three machines (a, b, and c) would be used with reliabilities equal to the original three. a. compute overall system reliability under plan 1. (round your intermediate calculations and final answer to 4 decimal places.) reliability b. compute overall system reliability under plan 2. (round your intermediate calculations and final answer to 4 decimal places.) reliability c. which plan will provide the higher reliability? plan2plan1