Help with the following two questions.

The following data are temperatures at which space shuttles were launched prior to the Challenger disaster in 1886. {54,57,57,63,66,66,66,66,66,68,70,70,70,70,70,72,73,75,75,75,79,79,81}. 2. If we make a stem and leaf plot with split stems (separating the first half of each set of ten from the second half), what entries lie in the first row of leaves opposite the first stem entry of "7"? 0 0 0 0 0 0 2355599 70 70 70 70 70 72 73 055599 0 0 0 0 0 023 X 3. Which set of intervals is appropriate to make a histogram with 4 intervals? 54 to 59, 60 to 69, 70 to 79, 80 to 81 54 to 59, 60 to 65, 66 to 71, 72 to 81 0 53 to 59, 60 to 66, 67 to 73, 74 to 81 51 to 60, 61 to 70, 71 to 80, 81 to 90 X Draw the resulting histogram in the workbook