Solve all questions please

QUIZ No. 2 1. Solve the system of equations below by hand using Gauss elimination. Apply partial pivoting then substitute your results into the original equations to check your answers. Use three decimal places in your calculation *, + x2 + x3 = 3 9x1 + 3x2 + 4x3 = 7 4x1 + 3x2 + 4x3 = 8 2. Solve the previous system using Gauss-Jordan method without pivoting. 3. Solve the system of equations below using Gauss elimination without pivoting. x1 + x2 + x3 = 15 2x2 + x2 + 3x3 = 32 3x + 2x2 - xy = 12