HELP! please help me with these

(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.

Complete the equation of the live through (-1,6) (7,-2)

One positive integer is 2 less than another. the product of the two integers is 24. what are the integers