In the mathematical expression 4 * 3 + 15 / 3 - 6, which operation is performed last?

A user calls the help desk and states that he was working on a spreadsheet and was unable to print it. However, his colleagues are able to print their documents to the same shared printer. Which of the following should be the FIRST question the helpdesk asks?

A. Does the printer have toner? B. Are there any errors on the printer display? C. Is the user able to access any network resources? D. Is the printer powered up?

_________ engineering is important when integrating new systems with legacy systems or systems that were developed in different environments.?

Fill in the blank(s) with the appropriate word(s).