Create a level 0 and level 1 diagram please. Urgent

Staff person checks on the preferred manner of payment. If the customer prefers to pay by credit card, the staff member takes and verifies all payment information. The picnic is then changed from provisionally scheduled to booked, and PRU (The picnic company) assumes that a commitment has been made to provide the picnic under the conditions agreed to. Additionally, the staff member prepares an invoice to mail to the customer showing all terms and arrangements regarding the picnic as well as the amount paid and the amount remaining for payment. PRU also accepts payments in person from clients who use cash and in person or by mail from clients who pay by check. All scheduling issues are arranged to accommodate the various payment methods. The scheduling status officially changes from provisional to booked following a verbal agreement with the customer and the receipt of the deposit, triggering changes in scheduling status. Frequent customers, such as the seven Fortune 500 companies in the region, have accounts with PRU. Specific employees at these firms have the authority to book a picnic. In these cases, the booking itself is considered sufficient to reserve the picnic, and no deposit is required. All cost records are maintained for these picnics, and a bill is sent to the accounts payable officer at the relevant company about two weeks after the picnic takes place.

Functional requirements I have so far:

Manage Payment System

1. System will prompt customer the payment options after they have finished picking picnic requirements

2. The system will verify payment information if the customer chooses to pay by credit card

3. The system will prepare an invoice to mail to the customer.

4. The system will allow the customer to choose to pay partial or full of the picnic fee

5. The system will verify successful payment of partial or full and notify manager to contact customer for final approval

6. The system will update the scheduling status after receiving verbal agreement from the customer and receipt of the deposit.

7. The system will send a final invoice before fully confirming picnic if any balance is still due