Are there three students who have a total of 20 t-shirts? Which students are they? How what operation will you use to solve the problem? Explain. Howwill you go about solving this problem?

(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.