Please help with the following steps, thank you!

3. Build one-variable data tables. a. Select cell C20 and create a reference to cell C15. b. Select cell D20 and create a reference to cell C17. Both formulas depend on cell C12, the one variable. c. Use cell D8 as the column input for the data table (Figure 9-87). (You can use any percentage from column D because its value is replaced by the proposed rates in column B in the data table.) d. Decrease the decimal two times for all values in the data table. 4. Name cell ranges. a. Click the Price Solver worksheet tab. b. Click cell C12 and name the range Selling_Price. You cannot use spaces in a range name. c. Name cell C14 as Total_Commission and cell C17 as PHRE_Commission