24) In MATLAB, char: a) is a built-in function that requires strings as parameters b) creates a matrix when executed c) can be used as a variable name e) all of the above d) both a 25) What pre-defined constant is used in MATLAB to represent -1 ? a) NaN b)ic)j d) both b andc e) All of the above 26) Which of the following formats can be used to add an empty line in a display a) long b) compact c) bank d) loose e) There is no such MATLAB co Questions 27-29 Are based on the following vectors: A-4 5 678 9 10 C=[2 4 6 8 10 12 14] D=[0 0 0 0 0 27) Which command will create the following matrix? 0 0] 4 567 8 9 10 2 4 6 810 12 14 o0 0 0 o o 0 a) X-IABCD b)X [A:B:C:D] c X-IA,B,C.DJ d) all of the above e) none of the above