Consider the following premises. u_2 -> q_8. q_8 -> r_8. u_2 or ~r_8. Can we infer r_8 -> u_2 from them?
 From u_2 -> q_8, q_8 -> r_8 we can infer u_2 -> r_8. Finally, from u_2 or ~r_8 we can infer r_8 -> u_2. Therefore, the answer is yes.