must be in Matlab

Question #1 must be completed before answering question #2. Remember to show all work, and include MATLAB outputs! 1) Create the following two matrices. 1 1 55 -6 4 _4 3 -2 9 A= - 1 2 7 0 9 2 2 -3 B = 1 1 2) Replace the center four elements of A with B to obtain the matrix C as follows. Do not explicitly create the matrix C by typing C = [...]. 5 - 4 1 9 5 1 1 2 -6 1 1 2 4 9 0 -3