Please only, HAND WRITTEN WITH BLUE INK PEN, PLEASE DO NOT PUT THE EXPLANATIONS ON THE PAPER JUST SHOW ALL THE CLEAR WORK STEP BY STEP PLEASE AND THE ANSWERS. thank you PLEASE FOLLOW MY DIRETIONS EXACTLY. I JUST WANT YOU TO WRITE IT WITH A BLUE PEN INK ONLY AND PLEASE DON"T PUT THE EXPLANATIONS ON THE PAPER JUST SHOW THE CLEAR WORK STEP BY STEP, thank you

2 For questions 9 through 13, use these matrices: A = 4 B = 09 CT 1 C 10 1 3 D 13 -2 9) (5 pts) Calculate or prove that it is undefined: B' 10) (10 pts) Calculate BC and C'B and then say whether these matrices commute. 11) (4 pts) Calculate or prove that it is undefined: DC 12) (8 pts) Calculate or prove that it is undefined: DA13) (10 pts) Calculate or prove that it is undefined: 3C - 2B 14) (17 pts) This is the equation of an ellipse. Write the equation in standard form, then identify the center, vertices, and endpoints of minor axis. Do not draw the graph: 16x2 + 9y- + 96x -18y + 9 = 015) (6 pts) Write the equation, in standard form, of the circle which is tangent to the r-axis and whose center is (4, 3). 16) (4 pts) Which ellipse has the smaller eccentricity, and how do you know? B A