9. (4 points) Solve the given systems of equations using the graphing calculator (rref function). Write the rref form of the matrix and then state whether the given system is consistent independent, consistent dependent, or inconsistent. If you get decimals in you answers (turn them into fractions). 2w+2z+2y2z=10 w+$+y+z=5 3w+:z:y+4z=2 w+312y+22=6 4 4 8 v t . 10. Let A 2 l 7 I B : [ 8 l 5 ] . and C : [ 5 ] evaluate the following expressmns: 1 '5 2 a m 7 a 2 ' _' _ _' 72 3 (a) (5 points) 4.4 313 (h) (8 points) (':l