Add a column to the query described in exercise 4 that uses the rank() function to return a column named balancerank that ranks the balance due in descending order.

Two students are discussing the flow of electricity. student a says that voltage is a measure of the amount of electron flow in a circuit. student b says that power is the product of voltage and current. which of the following statements is correct? a. only student a is correct b. only student b is correct c. both of the two students are correct d. neither of the two students is correct