Help me please I’ll be so appreciated

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8

(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.

Point q is equidistant from the sides of ∠tsr. find m∠rst.