Use the following table definitions to answer the question below. customer(custno, name, address, city, state, zip, phone, income asset(assetno, assetdesc, assettype) service(servno, servdesc, servrate) employee(empno, empname, emptitle pricehistory(assetno, date, price FOREIGN KEY assetno REFERENCES asset charge(chargeno, custno, servno, starttime, endtime, empno, billed, amtpaid) FOREIGN KEY custno REFERENCES customer FOREIGN KEY servno REFERENCES service FOREIGN KEY empno REFERENCES employee holdingcustno, assetno, qty) FOREIGN KEY custno REFERENCES customer FOREIGN KEY assetno REFERENCES asset trade(tradeno, custno, assetno, qty, price, date, type, status) FOREIGN KEY custno REFERENCES customer