Please, I want answers to these questions (what is the option + why did you choose this answer)

10. Refer to the table above. What formula should be entered in cell E5 in the accompanying Excel spreadsheet to compute total profit? (a) =B4B5+CC5 b. =SUMPRODUCT(B8:C8,SB\$4:\$CS4) c. =SUM(B5:C5) d. =SUM(E8:E10) 11. Refer to the table above. What formula should be entered in cell D8 in the accompanying Excel spreadsheet to compute the amount of carpentry used? a. =B4B5+C4C5 c. = SUM(B5:C5) d. = SUM(E8:E10) 12. Refer to the table above. Which cells should be changing cells in this problem? a. B4:C4 b. E5 c. D8:D10 d. E:E10 13. Refer to the table above. Which cells should be the constraint cells in this problem? a. B4:C4 b. E5 c. D 8:D10 d. E:E10