Diamond is typically used in a flowchart or indicate a decision.
A .xlsx file tells you that the file is an Excel workbook that utilizes XML files to create the various spreadsheets as well as macros and other hidden codes used to perform certain functions (which is why there's an X at the end; older .xls files had no indication of this external code being present, which is why they're almost never recommended for modern use).
Answer:
for this, u will have to put what u already know into a few stanzas and turn it in. hope this helps.
