In the table below are systolic blood pressure readings for a class of students. 120 | 115 | 105 | 113 | 128 | 99 | 122 | 141 | 130 | 117 |
126 | 108 | 100 | 106 | 114 | 104 | 112 | 118 | 102 | 110 |
What are the correct first two rows of a frequency table with 5 class intervals?

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.