I need help with my MATLAB code because it won't work:

This is the problem I was told to make a MATLAB code for:

This is the code I have:

syms x1 x2 x3 x4

%syms is the short code for constructing symbolic variables.

eqn1 = -3*x1 + x2 + 3*x3 - x4 == 0;

eqn2 = 5*x1 + 3*x2 - 2*x3 + x4 == 0;

eqn3 = 3*x1 - x2 + 2*x3 + 1*x4 == 0;

eqn4 = -5*x1 + -3*x2 + 5*x3 - x4 ==0;

%After entering 4 equations we need to convert them into matrix form.

[A,B] = equationsToMatrix([eqn1, eqn2, eqn3, eqn4], [x1, x2, x3, x4]);

%Equations converted into matrix form and you can see that in the output A.

P = linsolve(A,B);

%linsolve is a function to solve linear equations and the output is generated with all zeroes.

%Warning in the output tells that this system is not unique.

%So we need to convert in to augmented matrix A|b.

b = [0 0 0 0]';

M = [A b];

%M is the augmented matrix and you can see M in output.

R = rref(M);

%rref is row-reduced echolon form in shortcut. This function output can be seen.

The Output:

So can someone please fix my code so it tells me if the system has a unique solution, no solution, or multiple solutions and WHY, the output should explain why too!!!

2. Solve the homogeneous system. Tell whether the system has a unique solution, many solutions or no solutions and why. Use "format short" for this problem. 3x1+x2+3x3x4=05x1+3x22x3+x4=03x1x2+2x3+x4=05x13x2+5x3x4=0 >> Mathlabe2P1 'syms' requires Symbolic Math Toolbox. Error in Mathlabo2P1 (line 1) syms x1 x2 x3 x4 fx>>