Find g'(4) given that f(4)=3 and f'(4) = -5. g(x) = f(x)/x

Need on this one asap im almost done with this subject

(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.

Find the ratios of the corresponding sides