Question Completion Status: QUESTION 11 5 points Save An In a recent issue of the IEEE Spectrum, 84 engineering conferences were announced. Four conferences lasted two days. Thirty-six lasted three days. Eighteen lasted four days. Nineteen lasted five days. Four lasted six days. One lasted seven days. One lasted eight days. One lasted nine days. Let X = the length (in days) of an engineering conference. Organize the data into a chart that shows the most information. O a. Number of Days Conferences lasted 4 1-2 36 2-3 18 3-4 19 4-5 5-6 6-7 7-8 8-9 O b. Number of Days Conferences lasted 4 2 36 18 19 5