4. A n x n system of equations has a tridiagonal coefficient matrix. For n = 5 the coefficient matrix has the form: 0 2 -1 0 -1 2 -1 0 0 0 -1 2 - 1 0 LoLoo 0 0 0 -1 2 2 0 0 Develop a MATLAB program to solve a system of equations with this tridiagonal coefficient matrix for a general value of n. To solve the tridiagonal system of equations use the function Tridiag posted on myCourses (in the MATLAB folder). Refer to the L4-2 notes for information about the Tridiag function. Test your program for n = 5 and two larger values of n. For each case, use a right-hand-side vector that has 100 as the first element with the remaining elements equal to zero (i.e., b = (100 0 0 ... 0]'). Use x to represent the solution vector in your program