In cell B7, insert the SUMIF function to total the commissions by agent. Use mixed references for the ranges; and use a relative reference to cell A7. Copy the function and use the Paste Formulas option to paste the function in the range B8:B9 so that the borders are preserved. 5 9 The top-middle section of the spreadsheet is designed for summary statistics for multiple conditions. You will calculate the number of houses sold for each agent when he or she served as a Dual Agent (DA). Use mixed references for ranges and the agent code condition in cell J3. Use relative cell references to the agent condition in cell E2. When you copy the formulas, use the paste Formulas options to preserve border formatting. In cell F2, insert the COUNTIFS function in cell F2 to count the number of houses sold by the first agent (cell E2) who