5. Use Matlab's lu function to obtain L,U, and P matrices for the matrix equation in question 4 and also for the system below with three separate solution vectors. Show the process of solving these systems of equations using these three L,U and P matrices. Note that the subscript notation for the three components of x labelled 1,2 and 3 , is not to be confused with the completely unrelated 1,2,3 labelling of different solution vectors (which could, for instance, be labelled bd,be,bf if preferred). 113102221x1x2x3=bb1=314b2=9107b3=210