Alex is a project manager who uses a PC for his job. He works primarily in large Microsoft Excel spreadsheets, where he tracks and edits information in multiple rows of data. Other than this, he mainly uses his computer for email and general Internet searches. He has recently installed Windows 7 and is having some difficulty accessing his most frequently used programs and files, as well as scrolling through the information in his spreadsheets efficiently. What are the three most useful Windows 7 customizations you would suggest to Alex? Explain.