Please solve one using MATLAB and the other manually. I need to understand both methods for my exam. Thank you!

Consider the following system of equations: 7x1+x2+5x33x4=65x1+x24x3+6x4=3x13x27x37x4=18x12x28x3+6x4=1 If we wrote this as a matrix expression, Ax=b, What is x3 ? Your answer must be correct to 0.0001, so use long format to make sure you have enough digits in your answer! Consider the following system of equations: 8x14x33x4=09x12x2+4x3+5x4=78x1+7x22x34x4=25x1+5x22x4=4 If we wrote this as a matrix expression, Ax=b, What is x1 ? Your answer must be correct to 0.0001, so use long format to make sure you have enough digits in your