1.) Determine if the ordered triple (2, -1, 3) is a solution to the below system; state yes or no and explain how you determined your answer; (5 pts). .r + y + :_ = 4 .r - 2y - :. = 1 2x - y - 2: = -l Mpg/{www.youtube.com/watch?v=nTngKVOch r13 2.) Solve the System of Linear Equations with Three Variables (create a new equation by adding the last two equations rst, then by using the new equation and the rst equation, solve for one of the variables. Use back substitution to nd the value of each variable). Be sure to state the solution as an order triple; (5 pts). [t' + I 8.5 3.) Sketch (graph) the system of inequalities on an x - y coordinate plane; be sure to shade the appropriate area. y >-1 1x2 + y2 5 25 . For assistance, consult your e-Text pages 876 and 877 and/or video below; (5 pts). https://www.youtube.com/watch?v=Vh10anAnYNWE https://www.youtube.com/watch?v=Eck2soAncPM E>