(a) Write down the MATLAB commands to construct the following matrix by ap- plying for-loop. 1 1/2 1/3 1/4 1/2 1/3 1/4 1/5 M 1/3 1/4 1/5 1/6 1/4 1/5 1/6 1/7 = (b) Write down the MATLAB commands to solve the following system of linear equations. Express the solution in the form of a vector. X 1 + x2 +*23 +*24 = 1 x1 + x2 + x3 + x4 = 2 1 X1 +3x2 + x3 + 4X1 + x2 + x3 + x4 = 4 - 3 Fox 4