Assignment task:
Peter has been a legal assistant at Law Firm A since 2022. He invested $50,000 in sports equipment manufacturing company B at the beginning of 2021. He was supposed to receive an annual interest of USD 7500 as per their agreement, regardless of Company B's business results. However, Company B has not paid any interest to Peter in the past two years and has failed to return his investment capital.
The question is whether Peter can contract with Law Firm A to sue Company B and demand payment of interest for the years 2021 and 2022 (totaling $15,000) and the return on his $50,000 investment. If Company B agrees to the lawsuit, can Peter continue working as a paralegal for Firm A related to this case?