MATLAB ONLY

PLEASE ANSWER THE SHORT QUESTIONS

To draw the displacement for several values of the mass, we use in the script: Select one: O a. All of these O b. If else function code45 d. hold on e. for loop To plot the displacements of the first 2 masses of a 4DOF system using Modal Analysis method, we should write: Select one: a. plot(time, X(3,:), time, X(4,:)) b. plot(time, X(1,:), time,X(2,:)) c. None of these d. plot(time, X(:,1), time,X(:,2)) e. plot(time, X(:,3), time, X(:,4)) When transforming the equation of motion into first order differential equation, matrix A is obtained 0 1 which has the following form where: K M M Select one: O a. 1 is a square identity nhatrix of size (2*number of degree of freedom) O b. None of these O c. 1 is a square ones matrix of size (2*number of degree of freedom) O d. 1 is a square ones matrix of size (number of degree of freedom) O e. 1 is a square identity matrix of size (number of degree of freedom)