help with these please

Netflix VA MTH 110 HW #8 - Chapter 5 Section 1 - 2 - MTH 110, sec 19. [-/1 Points] DETAILS TANAPMATH7 5.2.026. MY NOTES ASK YO Pivot the system about the element in row 2, column 2. (Enter the augmented matrix with all cells in their original position.) OOH UT W . 6 -1 Need Help? Read It Watch It 20. [-/6 Points] DETAILS TANAPMATH7 5.2.028. MY NOTES ASK YO Fill in the missing entries by performing the indicated row operations to obtain the row-reduced matrix. 1 R Z Need Help? Read It Watch It 21. [-/24 Points] DETAILS TANAPMATH7 5.2.030. MY NOTES ASK YO