I need help with question d, e, and f

(1 point) Solve the following system using augmented matrix methods: 871 + 4:2 + 5613 = 28 -371 - 312 -2713 = -15 12r1 + 812 + 92rs = 48 (a) The initial matrix is: 8 56 28 3 -3 -27 -15 12 92 48 (b) First, perform the Row Operation = R, -> R1. The resulting matrix is: 1 1/2 7 7/2 -3 -27 -15 12 92 48 (c) Next, perform the operations +3R1 + R2 -> Ry -12R1 + Rs -+ Rs. The resulting matrix is: 1 1/2 7 7/2 0 -3/2 -6 -9/2 0 2 8 6 (d) Finish simplifying the augmented matrix down to reduced row echelon form. The reduced matrix is: Remember: This matrix must be simplified all the way to reduced form. (e) How many solutions does the system have? If infinitely many, enter "Infinity". If none, enter 0. (f) What are the solutions of the system? $1 = 12 = Is =