a$)$ Write down $5$ threats in the code of ethics and behavior, and provide an example of each threat that may lead to the occurrence of the threat. $($b$)$ You are the audit manager of J company and plan to audit LV company. LV company became a customer of J company four years ago and mainly produces expensive mobile phones.During the planning phase of the audit, the audit manager obtains a large amount of information. LV employees have the right to purchase mobile phones at a price of $10\%,$ while the audit team was also able to purchase phones at a price of $10\%$ in previous years.The CFO of LV Company is unable to continue working due to illness this year. However, the company had no one available, so a senior auditor in the audit team was seconded to LV company for $3$ months. The audit partner recommended this senior auditor to temporarily assume this role because he is familiar with the company's business. At present, LV company needs to pay $16\%$ of the company's total expenses to the audit team, including fees and taxes.The audit manager found an excellent relationship between the audit partner and the financial director of LV company while reviewing the correspondence documents. Last year, the two of them took a family vacation together during the holiday period. Due to this relationship, LV company still owes J company $20\%$ of the audit fees.Requirement:$1$ Explain the ethical threats that may affect the independence of Company J in the case$\mathrm{.}2$For each threat, please explain how to avoid it$.($c$)$ Describe the work procedures that accounting firms should follow before deciding whether to accept a new audit engagement.