Bestronics has a three-step process for processing customer sales. First, the cashier must look up the customer's loyalty card on the company's information system. Second, the cashier enters the transaction on the point-of-sale register. Third, the cashier processes the credit card through a verification system.

a. If the reliability of the information system is 0.998, the reliability of the point-of-sale register is 0.992 and the reliability of the credit card verification system is 0.978, what is the overall system reliability?

b. If the store manager wants to ensure at least a 98 percent system reliability, make a recommendation