Please answer my questions based only on the [Material] below.
Rules:
1. For information not in the material, answer directly "not mentioned in the material"; do not speculate or add anything;
2. After each answer, note in parentheses which sentence in the material it is based on.

[Material]
"Qingyun" is the company's internal reimbursement system launched this year. Employees can photograph and upload invoices on their phones, and the system automatically recognizes the amount and the payee name. Reimbursements under 5000 yuan per transaction are approved by the department manager; 5000 yuan and above require additional sign-off by the finance director. Reimbursement funds are paid to the payroll card within 3 business days after approval.

[My questions]
1. For a single reimbursement of 8000 yuan, who approves it?
2. How long does the reimbursement take to arrive?
3. What is the per-night reimbursement cap for business trip accommodation?