This is for Lesson 6 Unit 4 (connexus students, grade 11. Quiz part 2. (PLEASE SHOW THE PROCESS. And please answer all 3.. Please and thank you!) Question 1: Solve the system by substitution. -x-y-z=-8 -4x+4y+5z=7 2x+2z=4 Question 2: Solve the system by elimination. -2x+2y+3z=0 -2x-y+z=-3 2x+3y+3z=5 Question 3: Given the system of constraints, name all vertices of the feasible region. Then find the maximum value of the given objective function. Constaints: x≥0 y≥0 y≤ 1/3x+3 5≥x+y Objective Function: C=6x-4y Thank you in advance!! This helps me (and other students) out :)