Q.1 Given that x = [1 2; 3 4; 5 6], what is the output for mean(x) and mean(x,2). Explain the differences. (marts) Q.2 (2) Given the MATLAB code for a polynomial as f = [1 1 -4 -4], write down the corresponding function fx). (2 marks) Q.3 (6) Write a MATLAB code to represent the following polynomial function f(x) = (x + 2x + 2)(x - 2) (3 marks) Given the following matrix T below. *1991 T= 2 2 2 *3 y (2) Show how you can use MATLAB to declare matrix T as a magic square. What is the value of sum(sum(T)) ? (2 marts) (b) Show how you can determine if the matrix T is a singular matrix? 3 marks)