Question: write the system in the form Ax = b, then write a MATLAB function that performs back substitution to solve the system of equations. For

write the system in the form Ax = b, then write a MATLAB function that performs back substitution to solve the system of equations. For this function, think about matrix indices and the pattern involved in back substitution.

The output from the program should be the augmented matrix that contains the upper triangular form of the matrix A and the corresponding vector b and the final solution to the system of equations. The MATLAB script should work for any linear system of equations.Comments your code.

Do not use MATLAB built-in Gaussian elimination functions to solve the system of equations

b c + d + 2f = 0

2a + 5b 2c d + 3e + 6f = 6

a b 2d + 6e + 7f = 8

a + b + c d e 6f = 3

3a 9b + 4c 5d e + 2f = -1

-2a 3b + 3c + 2d + e = 11

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2. Place a value on the outcomes.

4. Obtain an annual amount of benefits (operational results) from training by comparing results after training to results before training (in dollars).

7. Calculate the ROI by dividing benefits (operational results) by costs. The ROI gives an estimate of the dollar return expected from each dollar invested in training.