Part I. True or False. Circle one. (20 points - 2 Each) 1. Tor F: The command 'clc' removes all the variables from the Workspace. 2. Tor F: The expression 1\5 returns 5. 3. Tor F: If a=(1, 2, 3]' then the expression (a'; a') cannot be used. 4. Tor F: If a=[1, 2, 31' then a'* a returns a scalar. 5. Tor F: If a=[1, 2, 3] and b=[3; 2; 1) then b*a returns a scalar. 6. Tor F: Use ['abc'; 'ef'; 'xyz'] can create a new string matrix. 7. Tor F: 3i is the same as i3. 8. Torf: (21314) returns the same value as (24(344)). 9. Tor F: If A is a squared matrix, then A*A' = A'*A is always true. 10. Tor F: If A and B are two matrices with different dimensions then size(length(A)) is equal to size(length(B)) Part II. Multiple Choices. Circle one answer. (20 Points - 2 Each) 11. If A=(5, 9, 3, 71', then size(A) returns: a. 22 C. 14 b. 41 d. None of the above. 12. If A is a 4x4 matrix, then A*A^(-1) returns: C. eye(4) b. eye(4, 1) d eye(1,4). 13. If the command window is under 'format short e', then value 12.345678 will be displayed as: a. 12.35 1.2346e+001 b. 12. 3457 d. 12.3457e+000. 1 14. Which of the following is not an element-by-element operation? 15. In command window, the meta-character which can be used as a command separator is: a. C. b. d. 16. If str=['hello'; 'kitty'), then size(str) returns: a. 10 1 C. b. 25 d. 17. If A=(10:-2:1), then A (4) returns: 1 10 5 2. 6 d. None of the above. 18. ('abc-'a') returns: a. 0 1 2 C. -1 0 1 b. 101 d. None of the above. 19. If A=[2, 4; 3,5; 1, 6), then size(A(:)) returns: a. 16 c. 23 b. 6 1 d. 3 2. 20. If a='A' and b=1, then a+b returns: a. 'B' b. 66 C. d. 98 None of the above. Part III. Short Answers. (4 Point) 21. A is an m-by-n matrix with m>n>1. Circle all the legible expressions in the following list: AA' A. A A + A AA2 A/A A/A A .^2 Part IV. Short Answers. (15 Point - 3 Each) Let A = [1:4; 5:8; 9:12] 22. Al :) 23. Al:, end) = 24. length( A(:)) 25. If we set A(3, 3)={ 1, then A= 26. If Al :)=12:-1:1, then A= Part V. Short Answers. (6 Points - 3 Each) 27. If a=(1:5), then a(2)=[] returns 28. If a=[4, 2, -3) and b=[1, 2, 3), then a*b' = Part VI. Short Answers. (24 Points) 29. (3 Each) According to the precedence of the operators, use parentheses to isolate them in their operating orders. For example: 2-5^3*4 will be presented as (2-((543)*4))