Please help. Kindly explain it step by step. Thanks!

A polypeptide was treated with 2-mercaptoethanol and produced the following fragments: Fragment 1: STCYKEVCKRFC Fragment 2: ACWC In another experiment, the same polypeptide (unreduced) was treated with thermolysin and produced the following fragments: (Note: The amino acids in the parenthesis is NOT their sequence. It only shows the amino acids that the fragment contains.) ( WC) (K, E, Y) (C, C, V, R, K, A) (F, S, T, C, C) Indicate the disulfide bonds in the polypeptide. Be sure to explain how you arrived at your