What is the function of the 'grid' command in MATLAB plots? a) To add a background color b) To display or hide grid lines c) To set the plot as a grid layout d) To create a 3D grid 10. What is the purpose of the contour3 function a) To create 3D bar graphs b) To draw 3D contour lines for a function c) To generate 3D scatter plots d) To create 3D surface plots MATLAB? 11. When is it appropriate to use the switch/case structure in programming? a) When there are multiple conditions to check b) When there is only one condition to check c) When looping through an array d) When defining a new function 12. Which MATLAB operator is used for equal comparison? a)== b) != c)- 13. What is the result of the expression 1 2 in MATLAB? a) True b) False c) Error d) Undefined