please solve this question

(3) (a) Show that a change of variables of the form f : px+qt, 7'; : m: + st can be used to reduce the one dimensional wave equation $11,175 : am, to an equation of the form 3:; : 0. Hence show that the general solution of the wave equation is of the form Mat) : F($ + ct) + C(a: ct) Where F, G are arbitrary twice differentiable functions