a. Do the following problems without a calculator. For each problem, display the answer you get. Then check on the calculator. Display your answers. 1a. 12 5+4 3 2a. 2 x 56+20 3a. 1684 4a. 16(84) 5a. 12 29 2 6a. (82) (2+1) 7a. 2(5+9) 8a. 2 x 5+2 9 9a. 8-23 +1 10a. -32 11a. 1005 2 12a. 100 5(2) b. What steps did you use to get the answers? c. What do we learn from the calculator about Order of Operations? d. Why is it important to use Order of Operations? e. Insert parentheses, if needed, in each of the following expressions so the answer for all problems will be 45. 1e. 4+3x7-4 2e. 2 5 - 1 10 9 3e. 2 x 3+3 5 4e. 3213+3 6