Consider the following premises. w_4 or ~t_2. w_4 <-> t_2. Can we infer t_2 -> w_4 from them? If possible, name the inference rules being used at each step.
 From w_4 <-> t_2 we can infer w_4 -> t_2 via biconditional elimination. Finally, from w_4 or ~t_2 we can infer t_2 -> w_4 via rewriting. Therefore, the answer is yes.