I don’t get this one guys pls help, it’s question 7

(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.

E. which of the following is not a possible probability? a. 25/100 b. 1.25 c. 1 d. 0

The sum of five and a number n is at least 12