A systems analyst is designing an app that automates loan application processes. However, many factors must be considered before a loan can be processed or verified by the system. The analyst has described the different scenarios as follows:

The app first checks whether the loan applicant is an existing customer or a new one.

For existing customers, the system first verifies the age of the customer, followed by their source of income, the amount of monthly income, and the loan applied for. It then displays whether the application has been processed successfully.

If the age of an applicant is less than 30 and they receive a monthly salary of up to

$30,000, their eligibility ranges between a minimum of $200,000 for no less than five years’ duration and a maximum amount of $500,000, payable in at least 10 years. Those who earn more than $30,000 a month are eligible for $500,000, payable in at least five years, and a maximum amount of $1,000,000, payable in at least 10 years. For those who earn from businesses, similar slabs apply, but an additional document verification and a registered TaxPayerID is required. Finally, those who earn less than $10,000 a month are not eligible for a loan.

All the applicants aged between 30 and 60 years are eligible for a maximum amount of $500,000 for a minimum duration of five years. For those who have retired, the eligible amount is capped at $200,000, payable in at least five years.

For new customers, their credit rating is verified first. If found acceptable, they too are eligible for loan applications according to the slabs mentioned above. The application is rejected if their credit rating is unacceptable.

Draw a decision tree for requirement specification of the application.